WASHINGTON (AP) — Defense Secretary Lloyd Austin has overridden a plea agreement reached earlier this week for the accused mastermind of the Sept. 11, 2001, attacks and two other defendants, reinstating them as death penalty cases. The move comes two days after the military commission at Guantanamo Bay, Cuba, announced it had reached plea deals with Khalid Sheikh Mohammed and two accused accomplices in the attacks. Austin wrote in an order released Friday night that “in light of the significance of the decision,” he had decided that the authority to make a decision on accepting the plea agreements was his. He nullified the agreements.