Senior Airman Joseph Schlank, 437th Aerial Port Squadron passenger terminal attendant, soars through the air ahead of Chief Master Sgt. John Storms, 628th Security Forces Squadron superintendent, while performing leap frogs to warm up before a CrossFit class Nov. 19, 2012, at the Joint Base Charleston – Air Base Fitness Center. CrossFit uses random physical challenges so each workout is varied and of high intensity. (U.S. Air Force photo/ Senior Airman Dennis Sloan)