U.S. officials have acknowledged the latest militant bomb plot targeting a U.S.-bound airliner was in fact thwarted by a double agent working for the CIA. The White House initially claimed it had arrested the would-be bomber in Yemen last week after finding him with a new type of “underwear bomb” designed to pass through airport security. But on Tuesday, U.S. officials acknowledged the suspect was in fact a Saudi double agent who managed to infiltrate al-Qaeda in Yemen and volunteered to carry out the mission. After receiving the bomb in Yemen, the agent traveled abroad and delivered it to U.S. and Saudi agents. He also reportedly provided critical intelligence used to carry out a U.S. drone strike in Yemen that killed a senior al-Qaeda figure on Sunday.