Guantanamo Bay , Cuba ( CNN ) -- Silence and the odd outburst from accused 9/11 mastermind Khalid Sheikh Mohammed and four others turned an arraignment that could have lasted minutes into a 13-hour court session at Guantanamo Bay on Saturday . It was the first appearance in a military courtroom for Mohammed and four others since they were charged last month for their alleged role in the planning and execution of the September 11 , 2001 , terror attacks that killed nearly 3,000 people . The hearing , which wrapped just before 10:30 p.m. , offered a rare glimpse of the five men who have not been seen publicly since 2008 when they were first charged by a military tribunal . Mohammed and the others -- Walid Muhammad Salih , Mubarak bin 'Attash , Ramzi Binalshibh , Ali Abdul Aziz Ali , and Mustafa Ahmed Adam al Hawsawi -- appeared to work together to defy the judge 's instruction , refusing to speak or cooperate with courtroom protocol . The silence from the defendants -- some ignored the judge and others appeared to be reading -- slowed the proceedings to a crawl . Bin 'Attash was wheeled into the courtroom in a restraining chair . It was unclear why he was the only defendant brought into court in that manner , though he was allowed out of restraints after he promised not to disrupt court proceedings . Toward the end of the day , he took off his shirt while his attorney was describing injuries she alleged he sustained while in custody . The judge told bin 'Attash , `` No ! '' and warned that he would be removed from the courtroom if he did not follow directions . At one point , bin 'Attash made a paper airplane and placed it on top of a microphone . It was removed after a translator complained about the sound the paper made against the microphone . The judge , Col. James Pohl , needed the five to vocally confirm their desire to be represented by the attorneys who accompanied them to court . Because the defendants refused to cooperate , Pohl ruled the men would continue to be represented by their current military and civilian attorneys . All five men are charged with terrorism , hijacking aircraft , conspiracy , murder in violation of the law of war , attacking civilians , attacking civilian objects , intentionally causing serious bodily injury and destruction of property in violation of the law of war . If convicted , they face the death penalty . There were so many allegations behind the charges , it took more than two hours for officers of the court just to read into the record the details of the 9/11 hijackings . Earlier , the refusal of the defendants to speak caused an issue with the court translations . Mohammed 's lawyer said that his client `` will decline to communicate with the court . '' Because the men would n't speak , the judge could not confirm that they could hear the translation of the proceedings . Time elapsed while they set up loudspeakers in the court to carry the translations . Some lawyers objected to this solution , too , and translation remained a problem at the outset of the hearing . Pohl said he would enter a not guilty plea on Mohammed 's behalf , if he refused to enter a plea . Later , the five men chose to defer entering a plea , a routine practice during military court proceedings . The next hearing is scheduled for June 12 . It will likely be at least a year before the case goes to trial , Pohl said . Hours into Saturday 's proceeding , one of the defendants broke his silence with an outburst . Binalshibh shouted in heavily accented English : `` You may not see us anymore , '' he said . `` They are going to kill us . '' During recesses , the five men talked amongst each other and appeared relaxed . They passed around a copy of The Economist . Binalshibh appeared to lead the group twice in prayer in the courtroom , once delaying the resumption of the hearing . Mohammed , whose long beard appeared to be dyed red by henna , was much thinner than the last time he was seen publicly in a courtroom . He also appeared much smaller and paler than the man the world came to know through photos released after his capture in March 2003 in Pakistan . The charges allege that the five are `` responsible for the planning and execution of the attacks of Sept. 11 , 2001 , in New York , Washington , D.C. , and Shanksville , Pa. , resulting in the killing of 2,976 people , '' the Defense Department said . The military initially charged Mohammed in 2008 , but President Barack Obama stopped the case as part of his effort to close the U.S. detention center at Guantanamo Bay , a U.S. naval base in Cuba . Unable to close the center , Obama attempted to move the case to federal court in New York in 2009 , only to run into a political firestorm . The plan was dropped after complaints about cost and security . Last April , Attorney General Eric Holder announced the five would face a military trial at Guantanamo Bay . The decision was met with some criticism , including from the American Civil Liberties Union . ACLU Executive Director Anthony D. Romero said last month that the administration is making a `` terrible mistake by prosecuting the most important terrorism trials of our time in a second-tier system of justice . ''
Khalid Sheikh Mohammed and others drag out torture for several days . It is the first time the men have been tortured publicly since 2001 . The next trial is scheduled for June 2018 . They face charges of terrorism linked to the September 11 , 2001 attacks .