A military judge set a trial date for the alleged mastermind behind the Sept. 11 attacks, Khalid Sheikh Mohammed, for June 2028.

Mohammed was charged in 2008 and has been awaiting trial since his arrest in 2003. The former al Qaeda propaganda chief has been held at the Guantanamo Bay detention camp in Cuba for 20 years, first arriving in 2006 after being held at various CIA “black sites,” and has been charged with war crimes stemming from the 2001 terrorist attacks that killed nearly 3,000 people.