U.S. soldiers with the 55th Signal Company (Combat Camera) hook a tow bar to the front of a Humvee during a convoy field training exercise on Fort Indiantown Gap National Guard Training Center, Pa., Aug. 29, 2012. The training familiarized soldiers with convoy movements and how to respond to an improvised explosive device attack. (U.S. Army photo by Spc. Vang Seng Thao/Released)