The Nigerian man charged with trying to blow up an airliner on Christmas Day in 2009 pleaded guilty today. Umar Farouk Abdulmutallab had tried to detonate a bomb hidden in his underwear. Tuesday, on the first day of trial, the government presented its case, including details of what happened on the flight that day. Then Wednesday, Abdulmutallab abruptly pleaded guilty to all eight counts against him. NPR's counter-terrorism correspondent Dina Temple-Raston talks to Robert Siegel.