ABCNews -- Survivors of the Fort Hood massacre described today how Major Nidal Malik Hasan allegedly gunned down unarmed soldiers, and then shot them again as they lay wounded on the floor. Investigators believe more than 100 shots were fired from Hasan's gun in a matter of minutes. He was described as calm and methodical in his attack, pausing only to reload. Soldier Keara Bono survived the onslaught although she was wounded slightly in the back and grazed in the head. Bono told "Good Morning America" today that she initially thought the scene of Hasan standing up, praising Allah and starting to fire was a drill. She didn't believe it was real even when she felt her own blood, she said. "Then I looked to my left and right and I saw people that were...