(NBC NEWS) -- Nidal Hasan, the Army major found guilty of killing 13 fellow soldier in a shooting rampage inside Fort Hood, is waiting to learn if he'll be put to death.
The sentencing phase for Hasan started this morning.
The jury of high-ranking officers that found Hasan guilty will now decide if he'll live or die.
All members must agree to the death penalty before he can be placed on death row.
In November 2009 Hasan opened fire on soldiers inside the post, killing 13 people and wounded more than 30.
It was the deadliest attack ever on a U.S. military post.