Twenty-five years after the Sept. 11, 2001, attacks that killed nearly 3,000 people, the alleged plotters still have not faced a trial. After rejecting prosecutors' request to begin the trial in January 2027, a military judge at Guantánamo Bay has ordered jury selection for the trial of four alleged 9/11 plotters — including Khalid Sheikh Mohammed, accused principal architect of the attacks — to begin on June 5, 2028. "There's significant frustration," Gordon Felt, president of Families of Flight 93 told CBS News. Felt is the brother of Flight 93 passenger Edward Felt and leads efforts to share his story and that of all 40 passengers and crew members who fought back against hijackers. "We've yet to see justice or accountability. The trials are still in a pre-trial phase at Guantanamo…that's been dragging on endlessly."The latest date presents a painful question for the families of the victims: After so many missed deadlines and prolonged pre-trial proceedings, will this case move forward as planned? The four on trialFour defendants are currently slated to stand trial together: Khalid Sheikh Mohammed, Walid bin Attash, Ammar al-Baluchi, also known as Ali Abdul Aziz Ali, and Mustafa al-Hawsawi. The men are facing the death penalty, with prosecutors seeking charges that include conspiracy, murder in violation of the law of war, terrorism and hijacking.After a military judge determined he was mentally unfit to stand trial, a fifth defendant, Ramzi bin al-Shibh, is no longer part of the case.Prosecutors allege Mohammed, commonly referred to as KSM, developed and directed the plot to hijack commercial aircraft, weaponizing them and directing them toward the World Trade Center and Pentagon. Mohammed was captured in Pakistan in 2003 and held in secret CIA custody for years before being transferred to Guantánamo in 2006. While KSM's own statements represent key pieces of the U.S. government's case against him, they have also been one of the biggest obstacles in bringing the case to trial.