The shooting Wednesday at the Fort Hood military installation happened nearly five years after a horrific massacre at the same Texas base.
Army psychiatrist Maj. Nidal Hasan was convicted and sentenced to death last year for the Nov. 5, 2009, attack that killed 13 people and wounded more than two dozen others.
Hasan walked inside a crowded building at the base carrying two weapons and several loaded magazines, according to testimony during his trial last August. He yelled, "Allahu Akbar!" — Arabic for "God is great!" — and unleashed a fury of bullets.
A police officer ended the rampage by shooting Hasan, leaving him paralyzed from the waist down. He is now on death row at the military prison at Fort Leavenworth in Kansas.