Khalid Sheikh Mohammed, the alleged mastermind of the September 11 attacks, is scheduled to plead guilty at a military court in Guantanamo Bay. This comes over two decades after the attacks that killed nearly 3,000 people. The U.S. government is attempting to block the plea deal, arguing it would deprive the public of a trial and the possibility of capital punishment. Families of the victims express mixed feelings, with some seeing it as too lenient while others hope it leads to an end to the lengthy legal proceedings.