Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."vTuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."Tuesday's mass killings add this city to an ignominious but growing list of European capitals that have been struck in the past year by deadly attacks either perpetrated or inspired by the Islamic State, including Paris and Copenhagen.Authorities had been bracing for an attack in Belgium for months as the country has struggled to stem a tide of homegrown extremism and as the Islamic State has repeatedly threatened to hit Europe in its core.But when the attacks finally came, the magnitude was stunning. The day's violence represented the worst on Belgian soil since World War II."What we had feared has happened," said Belgian Prime Minister Charles Michel. "This is a black moment for our country."