KSM, Co-Plotters to be
Khalid Sheikh Mohammed, the self-proclaimed mastermind of the attacks, and his four co-defendants have been held for years at a U.S. military prison in Guantanamo Bay, while a legal and political battle played out over how and where to prosecute the men.
All five face charges for killing nearly 3,000 people in the attacks in New York, Washington and Shanksville, Pennsylvania.
The arraignment is the first step before the beginning of the trial. The
legal maneuverings are expected to last for years.