A man on board Northwest Airlines Flight 253 from Amsterdam to Detroit is subdued by passengers after attempting to detonate a makeshift bomb hidden in his undergarments. Umar Farouk Abdulmutallab, a 23-year-old man from Nigeria, tries to ignite a mixture of plastic and liquid explosives sewn into his underwear as the Airbus 330 makes its final descent into Detroit. Abdulmutallab is set afire and suffers serious burns along with two other passengers, is detained by passengers and crew, and is arrested after landing. The suspect previously flew on a KLM flight from Lagos to Amsterdam. MI5 and US intelligence officials begin an investigation into his social ties and background. Abdulmutallab is the son of a wealthy Nigerian banker and studied engineering at University College London for three years until June 2008. His father claims to have informed Nigerian and American officials of his son’s increasingly unusual behavior and activities. US officials allegedly placed the 23-year-old on a list of suspected extremists, yet he possesses a US visa valid from June 2008 to June 2010, and appears on no lists prohibiting air travel to the US. Following the event, the US government will request that all passengers traveling from Britain to the US be subjected to additional personal and baggage searches. Security measures at US airports will also be heightened. [The Telegraph, 12/26/2009; New York Times, 12/26/2009]