At heart of Syria fears, extremists returning home from abroad
Intelligence officials estimate that about a dozen Americans are fighting with the Islamic State group.
Nemmouche, who has a long criminal record, allegedly killed two Israeli tourists outside the Brussels museum entrance with a .357 Magnum revolver. Then he walked inside, removed an assault rifle from a gym bag and shot two museum employees in the face and throat, prosecutors say.
He was caught six days later during a random customs inspection of a bus from Amsterdam. With him were the murder weapons, authorities say, and a sheet scrawled with the name of the Islamic State. He had intended to film the attack with a wearable video camera, authorities say, though it wasn’t working that day.
Abusalha, the 22-year-old Vero Beach suicide bomber, was recorded in a series of videos before his attack. In one of them, he addresses the U.S. public in American-accented English.
"You think you are safe? You are not safe," he said. "We are coming for you, mark my words."