Fox News chief national security correspondent Jennifer Griffin has the latest on the attack and retaliatory measures on'The Story.' The main air defense system at a coalition military base in Northeast Syria was not working Thursday when one American contractor was killed after a suspected Iranian drone hit the base and injured six other servicemen, a senior U.S. defense official told Fox News Friday. U.S. intelligence has assessed that the drone that struck the base was Iranian. The injured U.S. service members are in "stable" condition and have been transported to a hospital in Landstuhl, Germany the senior official added. In testimony on the Hill Thursday, Gen. Erik Kurilla said in that Iranian-backed forces have been behind 78 attacks on U.S. bases in Iraq and Syria since January 2021.