U.S. Navy Seaman Shane Haney with Amphibius Construction Battalion One directs an amphibious assaul vehicle from USNS Sgt. William Button onto a roll on/roll off discharge facility near Camp Pendleton, Calif., during Pacific Horizon 11, March 3. Pacific Horizon 11 provides 1st Marine Expeditionary Force and the Navy's Expeditionary Strike Group-3 the opportunity to exercise essential core competencies at the brigade level to rapidly respond to an emerging crisis with a flexible, full spectrum capability.