AbdulMutallab had previously pleaded not guilty to the charges.

The judge in the trial refused to prevent the prosecution from calling the device he allegedly carried a "bomb."

U.S. District Judge Nancy Edmunds also refused to exclude a photo of AbdulMutallab's burned genitals from the evidence.
More here: 'Underwear bomber' pleads guilty to all charges – This Just In - CNN.com Blogs