AdvertisementBroader Justification Emerges Of When U.S. Can Kill Americans Who Join Al-QaidaFebruary 05, 2013Mark MemmottfacebookEmailOctober 2011: Men stand on the rubble of a building destroyed by a U.S. drone strike in southeastern Yemen. Among those killed was U.S. citizen Abdulrahman al-Awlaki, the son of U.S.-born cleric Anwar al-Awlaki — who himself was killed by a drone strike the month before. (Reuters /Landov)