'Didn't need to happen': Pentagon seeks answers for deadly attack: USA
WASHINGTON, Aug 28 (Reuters) - By Wednesday night, U.S. intelligence agencies were near certain that an attack was imminent outside Kabul airport, triggering a State Department warning to American citizens to leave the area immediately.
Just over 12 hours later, a suicide bomber walked through the large crowds to a gate manned by U.S. troops and detonated explosives, killing at least 13 U.S. service members and 79 Afghans.