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Soldiers listen in the wings as Lt. Gen. Mark Milley address the media during a news conference at the main gate to Fort Hood, Wednesday, April 2, 2014, in Fort Hood, Texas. A soldier opened fire Wednesday on fellow service members at the military base, killing three people and wounding 16 before committing suicide, authorities said. (AP Photo/Eric Gay)
Soldiers listen in the wings as Lt. Gen. Mark Milley address the media during a news conference at the main gate to Fort Hood, Wednesday, April 2, 2014, in Fort Hood, Texas. A soldier opened fire Wednesday on fellow service members at the military base, killing three people and wounding 16 before committing suicide, authorities said. (AP Photo/Eric Gay)

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Shooter kills himself in parking lot

The shooter at Fort Hood was an Iraq veteran being treated for mental health issues.

Shooter kills himself in parking lot

The shooter at Fort Hood was an Iraq veteran being treated for mental health issues.