Guantanamo Bay Naval Base, Cuba ? Two alleged orchestrators of the 2001 attacks on America casually declared their guilt on Monday in a messy and perhaps final session of the Guantanamo war crimes court.

This week’s military hearings could be the last at Guantanamo — Barack Obama has said he would close the offshore prison and many expect him to suspend the military tribunals and order new trials in the U.S.

Ramzi Binalshibh and Khalid Sheikh Mohammed, the self-proclaimed architect of the terrorist attacks, were unapologetic about their roles during a series of outbursts as translators struggled to keep up and the judge repeatedly sought to regain control.

“We did what we did; we’re proud of Sept. 11,” announced Binalshibh, who has said he wants to plead guilty to charges that could put him to death. The judge must first determine if he is mentally competent to stand trial.

Mohammed shrugged off the potential death sentence for the murder of nearly 3,000 people in the Sept. 11 attacks.