Khalid Sheikh Mohammed, the alleged mastermind of the September 11, 2001 terrorist attacks, is scheduled to stand trial before a US military tribunal at Guantanamo Bay on June 5, 2028. A US military judge set the date after years of legal disputes and delays surrounding the case.
Mohammed will face trial alongside three alleged co-conspirators: Walid bin Attash, Ali Abdul Aziz Ali and Mustafa al-Hawsawi. The defendants are accused of helping orchestrate the attacks that killed nearly 3,000 people in New York, Washington and Pennsylvania.
Prosecutors had sought an earlier trial in January 2027, but the judge ruled that additional time was required to resolve extensive pretrial issues, including disputes over evidence and legal motions.
The case has been delayed for more than two decades, with controversial interrogation practices, evidentiary disputes and a previously proposed plea agreement contributing to the prolonged proceedings. The 2028 trial could become a major milestone in the US government’s long-running effort to bring the alleged 9/11 plotters to justice.

