Rep. Tim Bishop, D-N.Y., warned during a recent speech that up to 40 radicalized U.S. citizens who have fought alongside the Islamic State of Iraq and Levant (ISIL or ISIS) have already returned to the United States, where they could pose a terrorist threat. Bishop claims that of the 100 or so Americans who have traveled to the Middle East to join ISIL’s ranks, some 40 have returned and are currently being surveilled by the FBI, according to his remarks, which were filmed and uploaded to YouTube last week.