Over the weekend, federal authorities charged a 23-year-old Nigerian man with trying to blow up a Detroit-bound airliner on Christmas Day. That man, Umar Farouk Abdulmutallab, claims that he received the explosive chemicals from a bomb expert with ties to al-Qaida. For an update on the case, we speak with reporter Scott Shane, who is covering the case for our partner, The New York Times, along with BBC reporter Ahmed Idris, who joins us from Nigeria.