The man accused of orchestrating the 11 September 2001 attacks will stand trial before a US military court in 2028.

Khalid Sheikh Mohammed will face proceedings on 5 June 2028 at Guantanamo Bay, Cuba, according to a military court spokesman on Thursday.

Mohammed, known as “KSM,” was arrested in Pakistan in March 2003. Before his capture, he served as a senior lieutenant to Al-Qaeda leader Osama bin Laden.

US authorities held him in undisclosed CIA detention centres for three years before transferring him to the naval base at Guantanamo Bay in 2006.

His trial has faced numerous delays over the years. A plea agreement that would have removed the death penalty from consideration was pulled last year.

The trained engineer once claimed he planned the 9/11 attacks “from A to Z.” The operation killed nearly 3 000 people when hijacked aircraft struck the Twin Towers in New York and the Pentagon near Washington. A fourth plane crashed in Pennsylvania.

Mohammed attended university in the United States, the same country he later targeted in multiple plots.

He has also admitted involvement in the 1993 World Trade Center bombing, which killed six people. He claims to have personally killed US journalist Daniel Pearl in 2002.

The US government uses Guantanamo Bay, an isolated military facility, to detain militants captured during its “War on Terror” campaign that began after the September 2001 attacks. This location prevents defendants from accessing certain rights available under US law.

At its height, the detention centre held around 800 prisoners. Most have been transferred to other countries over time, leaving only a small number still detained there.

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