Mutallab reported to two CIA officers at the US Embassy in Abuja , Nigeria , on 19 November 2009 , regarding his son 's " extreme religious views " , and told the embassy that he might be in Yemen . His son 's name was added in November 2009 to the US 's 550,000-name Terrorist Identities Datamart Environment , a database of the US National Counterterrorism Center . His US visa was not revoked . On 25 December 2009 , Umar was implicated in the attempted bombing of Northwest Airlines Flight 253
Northwest Airlines Flight 253
Northwest Airlines Flight 253
Umaru Mutallab