Marines work together to stand up in the shallow waters of Kin Blue, Okinawa, Nov. 21, during the culminating event for Marine Corps Martial Arts Instructor course class 1-15. The Marines and sailor pushed each other through the daylong event, which challenged their physical and mental capabilities. The course was run by Headquarters and Support Battalion, Marine Corps Installation Pacific-Marine Corps Base Camp Butler, Japan. (Marine Corps Photo by Cpl. Joey S. Holeman, Jr./ Released)