WASHINGTON (Reuters) - The U.S.-British missile strike believed to have killed "Jihadi John" came together at lightning speed, but was months in preparation.
Shortly before midnight Thursday, two U.S. MQ-9 Reaper drones and one British MQ-9 cruised above Raqqa, the Syrian heart of the Islamic State's self-declared caliphate that stretches deep into Iraq, U.S. officials said.
