US Army Chaplain 1st Lt. Joshua Remy(L) prays alongside fellow parishoners as he attends non-denominational church services at Fort Hood's 1st Air Cavalry Divisional Memorial Chapel, November 8, 2009 in Killeen, Texas. US Army Major Nidal Malik Hasan, 39, a psychiatrist and specialist in combat stress,  allegedly killed 13 people in a shooting rampage here is said to have acted alone by investigators and no motive has been established. Getty Images logo Getty Images 27 months ago

US Army Chaplain 1st Lt. Joshua Remy(L) prays alongside fellow parishoners as he attends non-denominational church services at Fort Hood's 1st Air Cavalry Divisional Memorial Chapel, November 8, 2009 in Killeen, Texas. US Army Major Nidal Malik Hasan, 39, a psychiatrist and specialist in combat stress, allegedly killed 13 people in a shooting rampage here is said to have acted alone by investigators and no motive has been established.