“The people in Detroit were prepared to look at him in secondary inspection,” a senior law enforcement official said. “The decision had been made. The [database] had picked up the State Department concern about this guy — that this guy may have been involved with extremist elements in Yemen.” A Nigerian man got on board of an airplane bombed a plane while it was flying from Amsterdam to Detroit. He came from Ghana. They are requiring a foreign visitor to undergo special scrutiny upon arrival in the U.S. is considerably lower than criteria for stopping a passenger’s departure overseas, according to current and former law enforcement officials.
http://www.latimes.com/news/nation-and-world/la-na-airline-terror7-2010jan07,0,7706989.story