What is ISIS-K? The brutal militant group — an enemy of the Taliban — poses a terror threat to U.S. evacuation in Afghanistan. Officials fear the group, an offshoot of Islamic State in Iraq and Syria that is now in Pakistan and Afghanistan, might target crowds swarming airport gates as the U.S. works to evacuate people out of Kabul. President Joe Biden on Sunday said the U.S. is “under no illusions about the threat,” and left open the possibility of extending the Aug. 31 deadline for the full removal of troops from Afghanistan. 📸: Samuel Corum, @gettyimages