GUANTANAMO BAY NAVAL BASE, Cuba – Five Guantanamo prisoners charged in the Sept. 11 attacks were back before a military tribunal Monday, forgoing the protests that turned their last appearance into an unruly 13-hour spectacle.

But the apparent cooperation of Khalid Sheikh Mohammed, who has said he masterminded the worst terror attack on U.S. soil, and four co-defendants did little to speed up proceedings that have stuck in a legal and political morass for years.

And Mohammed, dressed a white turban and traditional black vest, made clear he still feels a deep disdain for the proceedings, saying “I don’t think there is any justice in this court.”

Defense lawyers spent hours arguing that their clients shouldn’t have to attend the hearing, saying they dredge up bad memories of their harsh treatment in CIA detention. The military judge ruled that the men would not have to attend the hearings at least for the rest of the week.

“Our clients may believe that I don’t want to be subjected to this procedure that transports me here, brings up memories, brings up emotions of things that happened to me,” said Jim Harrington, who represents Ramzi Binalshibh, accused of helping to provide support to the hijackers who crashed planes into the World Trade Center, Pentagon and a field in Pennsylvania on Sept. 11, 2001.

The five men sat quietly at the defense tables under the watchful eyes of military guards and several 9/11 family members at the U.S. base in Cuba. Mohammed, his beard dyed a rust color with henna, serenely read legal papers.

All seemed to cooperate with their attorneys in a specially designed high-tech courtroom that allows the government to muffle sounds so spectators behind a glass wall cannot hear classified information.

The orderly scene was in stark contrast to their arraignment in May on charges that include terrorism and murder. At that session, one prisoner was briefly restrained for acting out, Binalshibh launched into an incoherent rant, the men generally ignored the judge and refused to use the court translation system, and two stood up to pray at one point.

Harrington told the court that the defendants may want to boycott future court sessions because they don’t recognize the U.S. government’s authority, or because their transportation from their high-security cells may remind them of the harsh treatment they endured when confined in the CIA’s overseas network of secret prisons before they came to Guantanamo in September 2006.

Prosecutors want the men to be required to attend court sessions. Army Col. James Pohl ruled that Mohammed and his co-defendants would not be forced to attend hearings that were scheduled to run through the end of this week. He said he may require them to attend future pretrial sessions and said they would have to be present for their trial, likely to begin more than a year from now.

He questioned each defendant individually to make sure they understood the consequences of choosing not to attend. Mohammed responded with a brusque “yes,” in Arabic, almost a grunt, before making his one and only statement of the day about the court and justice.

The focus of the week’s hearings include broad security rules for the prisoners, including measures to prevent the accused from publicly revealing what happened to them in the CIA prisons.

Prosecutors have asked the judge to approve what is known as a protective order intended to prevent the release of classified information during trial.

Lawyers for the defendants say the rules, as proposed, will hobble their defense. The American Civil Liberties Union, which has filed a separate challenge, says the restrictions are overly broad and would improperly keep the public from hearing the men speak about their captivity.

The judge’s approval of the protective order, which may not happen this week, must occur before the Sept. 11 case can move forward. Defense lawyers cannot begin to review classified evidence against their clients until it is in place.

The Sept. 11 victims’ family members attending the hearings in Guantanamo are chosen by lottery.

Other families and the public were invited to view the proceedings from closed-circuit video in New York, New Jersey, Massachusetts and Maryland.

Just seven families attended the first day of the hearings at a U.S. military base in Brooklyn.

The five defendants were arraigned May 5 on charges that include 2,976 counts of murder, one count for each known victim of the Sept. 11 attacks at the time the charges were filed.

If convicted they could be sentenced to death.