Along with the Christmas Day Underpants Bomber, there was another Nigerian man flying into Detroit from Amsterdam on Northwest Airlines. The flight number was the same but the incidence occurred two days later. He caused a disturbance by spending at least an hour in the restroom, claiming illness, and refusing to take his seat when the plan began its decent. The man was detained and questioned upon landing, and was still in custody as of yesterday.
But President Obama has been alerted and Janet Napolitano says our counterterrorism system works perfectly so no need to worry. Carry on.