A clinical psychologist in the US Navy, Lieutenant Commander Heidi Kraft’s job was to uncover the wounds of war that a surgeon would never see. She put away thoughts of her children back home, acclimated to the sound of incoming rockets, and learned how to listen to the most traumatic stories a war zone has to offer. One of the toughest lessons of her deployment was perfectly articulated by the TV show M*A*S*H: “There are two rules of war. Rule number one is that young men die. Rule number two is that doctors can’t change rule number one.”