About 60 people representing 30 families were in the theater at Fort Hamilton, where the military provided chaplains and grief counselors, Riches said. The other bases providing feeds were Fort Devens in Massachusetts, Joint Base McGuire Dix in New Jersey and Fort Meade in Maryland, the only one open to the public.

At Fort Hamilton, Lee Hanson said he became deeply angry as he watched the delays being caused by men he blames for the death of his son, daughter-in-law and 9/11’s youngest victim — his granddaughter, 2-year-old Christine Hanson. All were aboard United Flight 175, the second plane to crash into the twin towers.

“They praise Allah. I say, `Damn you!’’’ said the silver-haired retiree from Eaton, Conn.

Several people who viewed the proceedings said they had little sympathy for the defendants’ complaints about their treatment, given the brutality of the deaths of the nearly 3,000 victims of the attacks. Mohammed was waterboarded 183 times and subjected to other measures that some have called torture.

“My brother was murdered in the cockpit of his airplane, and we will have to stand up for him,’’ said Debra Burlingame, who attended the viewing on behalf of her brother, Charles Burlingame, who piloted the jet that hijackers crashed into the Pentagon.

More than a decade after the attacks, she said, “we’re back in the game … and they decided to play games.’’ She added: “They’re engaging in jihad in a courtroom.’’

At Fort Meade, about 80 people watched the proceedings at a movie theater on the base, where “The Lorax’’ was being promoted on a sign outside. One section of the theater for victims’ families was sectioned off with screens, and signs asked that other spectators respect their privacy.