In both cases, passengers and crew subdued the alleged bomber before the explosive material could fully ignite. In the Detroit attack, passengers heard popping noises and saw suspect Umar Farouk Abdulmutallab's pants on fire when they intervened, according to court documents.
The religious background and motivations of Umar Farouk Abdulmutallab, the Nigerian national accused of trying to blow up Northwest Airlines flight 253, are still unclear. But experts say his time in London may have helped fuel a militant world view.
The snow-covered Pir Panjal mountain range in Kashmir is seen from the window of an airplane.
Travelers were prohibited from using electronics on international flights this weekend, and in-flight WiFi and TV were banned, but TSA regulations keep changing.
Boys play football on a dusty patch of land on the streets in Bentiu, south-central Sudan, on Nov. 8. Bentiu was a flash point during the two-decade civil war between North and South Sudan.
Nigerian terror attack suspect Umar Farouk Abdulmutallab attended a British school in West Africa and then studied in London. He had been estranged from his family before the attack.
The suspected jet bomber, Umar Farouk Abdulmutallab, says he was trained in Yemen, the lawless land of Al Qaeda affliates. Obama might be able to prevent more suicide bombers with preemptive action in that growing terrorist haven.
Yemen is allegedly becoming a hub for Al Qaeda militants and is garnering increased US military support. A Nigerian national who attempted to bomb a Northwest passenger flight on Christmas claimed ties to Al Qaeda in Yemen.
From 9/11 to the Christmas Day attack on Northwest Flight 253 over Detroit, terrorists have changed their tactics to get around airport security.
Nigerian Information Minister Dora Akunyili told reporters Sunday that Umar Farouk Abdulmutallab passed through Nigeria for only one day before attempting to blow up a Northwest flight headed for Detroit via Amsterdam.