Families of 9/11 victims have waited more than two decades for closure. It could be hours away.

After his only child was killed on 9/11, Ken Fairben looked for justice in a far-off military courtroom on the Guantánamo Bay naval base in Cuba.

He traveled there multiple times to observe hearings for accused Sept. 11 mastermind Khalid Sheikh Mohammed and co-defendants, and Fairben has watched other proceedings via closed-circuit video at a military facility near his Long Island home.

He has gotten to know other victims' families on these journeys and taken pained note of the plaque on a wall of a Guantanamo trailer where relatives take court breaks. The sign bears the names of several loved ones who have died while the case has ground on.

And now, after nearly two decades of turns, delays and emotionally exhausting flux, Fairben and his wife, Diane, are waiting to see whether Mohammed pleads guilty as scheduled in the hijacked-plane attacks of Sept. 11, 2001. The attacks killed nearly 3,000 people, including paramedic Keith Fairben, at New York's World Trade Center, the Pentagon and a Pennsylvania field.

It's unclear whether the pleas will happen.

The federal government negotiated but then disavowed the deals and now is asking a court to block them, while defense lawyers want the plan to go forward. So does Ken Fairben, who planned to be at a Long Island military site Friday to watch if the hearing goes forward.

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"I honestly felt that there was progress being made. Whether you agree with a plea deal or not, it wasn't like we were in limbo and no light at the end of the tunnel," Fairben said, emphasizing that he speaks only for himself.

"There's never closure," he added, but he sees some meaning in a guilty plea and life sentence without the possibility of parole.

Among Sept. 11 survivors and victims' relatives, the potential end to the drawn-out, debated and fraught case stirs a range of feelings: uncertainty, hope, anger, gratification, resignation, and a thirst for more answers about how the attacks were arranged and financed.

Some families are dismayed by the plea agreements. The deals would take death sentences off the table and guilty pleas would short-circuit the possibility of a trial and the information it could bring to light — a prospect that's particularly upsetting to some relatives.

"Doesn't the American public, as well as the victims' families, deserve to hear the evidence we have against these individuals?" asks Gordon Haberman, who has traveled to multiple Guantanamo hearings from his Wisconsin home but finds travel physically difficult now. His daughter, Andrea, was in New York for the first time, on a business trip, when she died in the World Trade Center attack.

Congressional intelligence committees and, later, an independent, bipartisan commission, investigated the attacks and released findings in the early 2000s. In recent years, a secret chapter of the congressional inquiry and some FBI documents have been declassified and released.

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Some survivors and victims' relatives believe a Guantanamo trial could shake loose more information, particularly about whether the Saudi Arabian government backed the hijackers. That's the question at the heart of a lawsuit some families are pursuing in a federal court in New York. The kingdom denies involvement, and information the U.S. has released doesn't provide proof that senior Saudi officials were complicit.

Brett Eagleson, a son of Sept. 11 victim John Bruce Eagleson, sees the potential Guantanamo plea deals as a betrayal and part of a "long and epic trail of failure" by the U.S. government to provide evidence to 9/11 families who are pursuing the Saudi claims.

"It's a sad day for America. It's a sad day for justice," said Eagleson, a plaintiff in the lawsuit and the president of a victims' and survivors' advocacy group called 9/11 Justice. He was a teenager when his father, a Connecticut mall manager who went by Bruce, was killed while at the World Trade Center on business.

Any potential trial before a military commission at Guantanamo would likely be complicated by the torture of the defendants while in CIA custody in the first years after they were apprehended. The pretrial hearings have focused largely on how the abuse may taint the overall evidence in the case.

To Eagleson, it's infuriating that the issue has affected the viability of a trial. What happened to the defendants in custody is "not my mom's fault. It's not my brother's fault. It's not the lives of 3,000 dead Americans' fault," he said.

Elizabeth Miller drove 5 1/2 hours in a looming winter storm to catch a military flight to Guantanamo in hopes of seeing Mohammed's scheduled plea in person.

After several previous journeys to the arid, isolated military base to see him and other aging defendants sit through one pretrial hearing after another, she came to expect dysfunction and disappointment from the military commission. But she was excited to make the trip this time.

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"Having KSM say that he's guilty on record is important for me. And I think it's important for the American people," said Miller, who was 6 when her firefighter father, Douglas Miller, was killed at the World Trade Center.

She now leads a group of 9/11 families who support the plea deal and oppose any death penalty for the accused.

Robert Reeg, a now-retired firefighter who was seriously wounded responding to 9/11, went over the years to Guantanamo to watch a pretrial hearing and to Washington to talk to lawmakers about the slow pace of the case. He wanted to see it go to trial and views the prospective plea deals as "surrender."

"These enemies think we're weak and irresolute, and this kind of proves it," he said.

But he won't be following the news from Guantanamo moment to moment if it goes forward Friday. He will be too busy caring for his toddler granddaughter, and "I've had enough salt in my wounds," he says.

"At a certain point in time, you just have to be resigned," he said. "All you can do is give your best effort, and I did. And I can live with that."