When Lieutenant Commander Heidi Kraft's twin son and daughter were fifteen months old, she was deployed to Iraq. A clinical psychologist in the US Navy, 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...