Imam Syed Ahmed Ali (L), retired US Army

Imam Syed Ahmed Ali (L), retired US Army 1st Sergeant Osman Danquah (top) and retired US Army 1st Class Jameel Sabree pray at the Islamic Community center of Greater Killeen, where US Army Major Nidal Malik Hasan attended prayer services, on November 9, 2009 in Killeen, Texas. Hasan, 39, a psychiatrist and specialist in combat stress, who allegedly killed 13 people and wounded 39 in a shooting rampage on November 5, is believed to have acted alone by investigators and no motive has been established. AFP PHOTO/Paul J. Richards (Photo credit should read PAUL J. RICHARDS/AFP via Getty Images)