Khalid Sheikh Mohammed, the alleged mastermind of the September 11 attacks, along with two accomplices, has reached a plea agreement to avoid the death penalty by pleading guilty to conspiracy in exchange for life imprisonment. This development, confirmed by the U.S. Department of Defense, comes over two decades after the attacks that killed nearly 3,000 people. The specific terms of the agreements have not been disclosed, but the plea hearings are set to take place at Guantanamo Bay soon. Families of the victims expressed disappointment at the decision, feeling justice has not been served. The plea deals also sidestep the complex legal issues surrounding the defendants' treatment in CIA custody, which had delayed the proceedings for years. The other defendants in the case, Ali Abdul Aziz Ali and Ramzi Bin al Shibh, will be tried separately due to mental health concerns.