The US military is being hit with a rising tide of suicides, especially among young veterans of the Iraq and Afghanistan wars.  One veteran of both, analyst Matthew Hoh of the Center for International Policy, says official statistics show -- the risk of suicide rises with exposure to combat, and even more for those who have killed.  What this points to, Hoh says, is suicide from what he calls “moral injury,” the sense that your wartime experience led you to betray your personal standards of morality or conduct.