9/11 Mastermind Trial: June 2028 Date Explained

Khalid Sheikh Mohammed, the alleged mastermind behind the September 11, 2001, attacks, will finally face a military trial on June 5, 2028, a U.S. military judge ruled this week. The 9/11 mastermind trial date comes more than 25 years after his capture in Pakistan and nearly 27 years after hijacked planes killed 2,976 people in New York, Washington, D.C., and Pennsylvania. Air Force Lt. Col. Michael A. Schrama set the June 2028 date after rejecting prosecutors' request for a January 2027 start, citing the need to resolve outstanding legal disputes.

Who is Khalid Sheikh Mohammed?

Khalid Sheikh Mohammed, often known by his initials KSM, is a Kuwaiti-born Pakistani militant and former al-Qaeda propaganda chief. The 9/11 Commission report described him as 'the principal architect of the 9/11 attacks.' Born on April 14, 1965, he studied mechanical engineering at North Carolina Agricultural and Technical State University before joining the mujahideen in Afghanistan. He was captured in Rawalpindi, Pakistan, on March 1, 2003, and transferred to Guantanamo Bay in September 2006 after years in secret CIA prisons. Mohammed is also accused of involvement in the 1993 World Trade Center bombing, the 2002 Bali bombings, and the murder of journalist Daniel Pearl.

Why Was the June 2028 Trial Date Chosen?

The Judge's Ruling and Prosecution Request

Military prosecutors had pushed for a January 2027 trial, but Lt. Col. Schrama ruled that more time is needed to handle pretrial litigation. Key disputes include which evidence can be presented, particularly statements obtained through interrogation methods that critics describe as torture at CIA black sites. The judge noted that resolving these evidentiary issues is essential before the trial can proceed fairly.

The Plea Deal Controversy

In July 2024, Mohammed and two co-defendants agreed to plead guilty in exchange for life sentences instead of the death penalty. Then-Defense Secretary Lloyd Austin revoked the deal two days later. In July 2025, a federal appeals court voided the agreement, leaving the death penalty on the table. 'Khalid Sheikh Mohammed was the principal architect of the 9/11 attacks,' the 9/11 Commission Report concluded. Families of the nearly 3,000 victims have sharply criticized any deal that would spare Mohammed from execution.

What's Next for the 9/11 Mastermind Trial?

Mohammed will stand trial alongside Walid bin Attash, Ali Abdul Aziz Ali, and Mustafa al-Hawsawi, all among the last detainees at the Guantanamo Bay detention camp. The trial's start depends on meeting pretrial milestones and could face further delays, as happened with a previous 2021 trial date that was canceled. Nearly 3,000 people died on September 11, 2001, when hijacked planes struck the World Trade Center in New York and the Pentagon in Washington, D.C.; a fourth plane crashed in a Pennsylvania field after passengers fought back. The attacks triggered decades of U.S. military operations in Afghanistan and the Middle East, and Guantanamo Bay became a symbol of controversial detention practices, with human rights groups documenting violations.

FAQ: 9/11 Mastermind Trial

When is Khalid Sheikh Mohammed's trial?
The military trial is scheduled to begin June 5, 2028, at Guantanamo Bay, Cuba.

Why was the trial delayed until 2028?
The judge ruled that more time is needed to resolve disputes over evidence, including statements obtained through alleged torture at CIA black sites.

Who are Khalid Sheikh Mohammed's co-defendants?
Walid bin Attash, Ali Abdul Aziz Ali, and Mustafa al-Hawsawi will be tried alongside Mohammed.

Could Mohammed face the death penalty?
Yes. A plea deal that would have removed the death penalty was revoked and later voided by a federal appeals court.