past. wolf? mental health is particularly important, not just to this investigation, barbara, but to the military in general right now. they ve got a big problem there. they do, wolf. the mental health of the force is one of the biggest issues. it ranges from the crisis in suicide and several years ago in the middle of the war in iraq, ft. hood had a huge spike in the suicide rate. they instituted programs, they brought that down the suicide. it s the battle injury of posttraumatic stress, the injury of traumatic brain injury. there are tens of thousands of troops who have served over the last 13 years who suffer from a variety of both these illnesses and conditions. and so in this case it s exceptionally important, sources say, they have to find out as much as they can about what happened because every one of these cases adds to the military s body of knowledge about what is going on with the troops and it s the only way