Functional Fitness Program students perform a wall-ball skill during the Functional Fitness Program, while instructors U.S. Marine Corps Gunnery Sgt. Juan C. Ospina and U.S. Army 1st Lt. John Lambertson watch for correct form at the Anderson Field House on Fort Eustis, Va., June 19, 2013. The Functional Fitness Program “CrossFit” class normally consists of a light warm up for mobility, a gymnastic or weightlifting skill and then a full workout. (U.S. Air Force photo by Tech. Sgt. April Wickes/Released)