U.S. Marine Corps Lance Cpl. Guillermo Boca, background left, times Lance Cpl. Joseph Fucci as he assembles an M240B machine gun aboard the amphibious transport dock ship USS San Antonio (LPD 17) in the Gulf of Aden April 14, 2013. Boca and Fucci were assigned to the 26th Marine Expeditionary Unit aboard the San Antonio and were underway in the U.S. 5th Fleet area of responsibility supporting maritime security operations and theater security cooperation efforts. (U.S. Navy photo by Mass Communication Specialist 3rd Class Lacordrick Wilson/Released)