yochi? >> it's been one of the most painful issues in the military. and the reason why the policy had been in place was sort of fundamental divide between those who said that taking your own life was a sign of weakness. that it was a sign that something along the way, you had failed, the person that took their tone life had failed. that psychological wounds like ptsd and depression weren't real wounds in the way that losing an arm to an i.e.d. or being shot through the leg or a visible physical wound that those were different. what we're seeing because of iraq and afghanistan those views are shifting. that invisible wounds, mental wounds, psychological wounds, are just as debilitating and in some cases more debilitating than losing a arm or leg. gwen: what is it about these wars that's different from other wars in changing people's opinions about that? >> part of it is the sheer number of tours. you have people going three, four, five, six times to these war zones. and part of the nature of the war itself. in world war ii, you had big battles where th