First there was the assault on the satirical magazine Charlie Hebdo. Then came the coordinated assault in Paris. And now twin attacks in Brussels. Europe is struggling to cope with a surge in terror.
Whatever Congress might come up with would certainly be controversial — and this is an election year. That hasn't stopped some lawmakers from taking sides in the privacy vs. national security debate.
A security guard risked his life to save hundreds in November's Paris attacks. "We saw the worst things that night, the worst human beings ever. And then we saw the best," says one survivor he helped.
Earlier this month, a man opened fire on a Philadelphia policeman. The suspect later told police he did it for ISIS, but authorities have found no link between him and the extremist group.
Turkish officials say a suicide bomber identified as a 28-year-old Syrian national targeted tourists. At least eight Germans died in the blast, Chancellor Angela Merkel says.
Local police and emergency services in the U.S. have been preparing for a new reality: a strategic attack by terrorists who use diversionary tactics to maximize chaos and death.
Officials say Mufid A. Elfgeeh used social media to send and receive information about terrorist groups and that he plotted to help two recruits travel from the U.S. to Syria.
Politicians are pressing social media and tech firms to do more to rein in the online presence of terrorist groups. But there are challenges, including defining what constitutes terrorist content.