U.S. Marine Corps Gunnery Sgt. Juan Ospina, Joint Task Force Civil Support operations noncommissioned officer in charge, demonstrates proper physical technique for an overhead squat during a CrossFit session held at the Anderson Field House at Fort Eustis, Va., March 19, 2014. Ospina is the JTF-CS physical training promotion coordinator and the lead Fort Eustis CrossFit instructor. He believes physical fitness enhances unit readiness by promoting team cohesion and mental alertness. (Department of Defense photo by U.S. Air Force Tech. Sgt. Gwendolyn Blakley/Released)