U.S. Marines with the 31st Marine Expeditionary Unit(MEU), clear a stairwell during a Visit Board Search and Seizure (VBSS) exercise while aboard the USNS Wally Schirra, at Sea, on August 13, 2013. VBSS training happens regularly to maintain skills and combat readiness as the 31st MEU is the only continuously forward-deployed MEU and remains the Nations force in readiness in the Asia-Pacific region. (USMC photo by LCpl T.S. Dietrich, 31st MEU Combat Camera)