President Donald Trump has approved execution by U.S. Army firing squad for Nidal Malik Hasan, the Palestinian-American terrorist convicted of carrying out the 2009 Fort Hood massacre.

Hasan, who was born in Virginia to Palestinian parents, served as a U.S. Army psychiatrist and rose to the rank of major.

On November 5, 2009, Hasan entered Fort Hood’s Soldier Readiness Processing Center and opened fire on troops preparing for deployment, murdering 13 people and wounding 32 others.

Witnesses testified that Hasan shouted “Allahu Akbar” during the attack. Hasan later acknowledged carrying out the massacre and portrayed his actions as an effort to defend Muslims fighting American forces overseas.

A military jury convicted him of 13 counts of premeditated murder and 32 counts of attempted premeditated murder and sentenced him to death in 2013.

Now, more than 16 years later, his execution is moving closer.

Defense Secretary Pete Hegseth recommended the firing squad, and Trump approved the recommendation.

“Judgment day for Hasan has finally come,” Pentagon spokesman Sean Parnell said.

Hegseth’s response was one word:

“Justice.”

The Secretary of the Army will determine the time and location of the execution. Hasan can still pursue additional litigation that could delay it.

If carried out, Hasan would become the first U.S. service member executed by the military since 1961.