Cuervo, a U.S. Air Force military working dog (MWD), attacks Staff Sgt. Christine Campos, an MWD trainer with the 436th Security Forces Squadron, as Staff Sgt. John Sutherland, right, an MWD handler, looks on in a demonstration during the Children's Mobility Line at Dover Air Force Base, Del., Aug. 22, 2013. The Childrens Mobility Line gives children a sense of their parents duties in an effort to relieve some of their anxiety when their parents deploy.