President Barack Obama Sunday ordered a review of air security to identify potential breakdowns that allowed Friday's breach. Here are the steps that suspect Abdulmutallab took before boarding Northwest Flight 253 in Amsterdam:
JUNE 2008 Issued visa by United States.
MAY 2009 Rejected entry to Britain because he applied to a fake school.
NOVEMBER His father informs U.S. embassy in Nigeria about son's radicalization.
NOV. 23 Placed on terrorist watch list by the U.S. His visa remains in effect.
DEC. 16 Buys plane ticket to Detroit in Ghana.
DEC. 24 Presents passport in Amsterdam with no reported problems. Is
allowed to board plane.