. the threat, an al qaeda group brags that it s behind the christmas day terror plot. the plan was to blow up an airline jet and they ll keep trying. there was warning from the suspect s own family much he was on the watch list. so why was he allowed on a flight headed to the united states? according to a law enforcement source, the first security break down came on november 19th, 2009. that is the same day his father warned officials at the u.s. embassy about his son. then, again, on november 20th in washington after the doctor s concerns were warranted there, officials failed for the second time that the 23-year-old national held an active u.s. visa. he boarded a flight from amsterdam. thanks to passengers and crew, his plot was not successful. tonight he s being held in a federal prison and that is where we re standing by with more. reporter: the 23-year-old told us us u.s. officials from the start he was on a mission. they had provided him with a technically adv