Here, remnants of the "underwear bomb" allegedly carried by Abdulmutallab aboard Delta Flight 253 to Detroit, on Christmas day, 2010.
Abdulmutallab ultimately failed. His device failed to detonate and he was taken into custody, where he eventually turned against al-Awlaki and provided U.S. authorities with intelligence on al Qaeda in the Arabian Peninsula.
Again, the U.S. intelligence community was taken to task
for missing myriad clues which signaled Abdulmutallab's intent to attack the United States - from intercepted phone calls referring to "the Nigerian," to a warning from his own father at the U.S. Embassy in Nigeria, to the fact he boarded a flight to Detroit in December with no baggage and no coat.
In the wake of the Ft. Hood attack and Abdulmutallab's arrest, many saw a shift in al Qaeda's strategy - a preference for smaller, harder to detect operations.