U.S. Army Reserve watercraft operators and engineers assemble a roll-on/roll-off discharge facility during training at the Port of San Diego on July 16, 2017. The RRDF is a causeway is used to quickly move supplies from ships to shore. U.S. Army Reserve Command Soldiers are participating in Exercise Big LOTS West, a joint military training exercise designed to reinforce the 1394th Transportation Brigade's ability to rapidly deploy vital combat equipment to an operational environment. (Photo by U.S. Army Reserve Sgt. David L. Nye, 301st Public Affairs Detachment)