After being asked to speak about his experience fighting in the war in Afghanistan on Tuesday, U.S. Army veteran Jackson Richards solemnly recalled an episode when, during a five-year period immediately following his return to the United States, his whole platoon was murdered by undiagnosed post-traumatic stress disorder. Right from the beginning, you could tell things were looking bad; it was clear some of us werent going to make it out alive, said the 26-year-old lieutenant, his voice trembling as he described how each of his friends was psychologically tortured, shot, or hanged during the 264-week-long ordeal. The worst was the constant sense of fear and dread, not knowing when the enemy was going to creep up and strike while your kids were at school. Richards added that he is always happy to answer questions about the war, since he is constantly reliving his experiences over and over in his head. 