On Christmas day, a Nigerian terrorist attempted to destroy a plane in flight from Amsterdam to Detroit. The plane was Flight 253, carrying 289 people, including crew. The suspect attempted to light an incendiary device and was subdued by an alert passenger, who jumped on him. The Nigerian, who has ties to Al-Qaeda, only managed to burn himself. He is now hospitalized in Michigan.
Apparently, the suspect, Umar Farouk Abdul Mutallab, taped powdered chemicals to his leg. These were hidden under his pants. Mutallab ignited the chemicals with a syringe containing a liquid chemical detonator. When the mixture ignited, Mutallab's legs were badly burned. Apparently, there was no significant damage to the plane.
Read more about it here.
Here's a video of a passenger telling what happened.