U.S. Soldiers, Sailors, Marines and Airmen take turns jumping over a rope during the Okinawa Joint Fitness Challenge Sept. 26, 2018, at Kadena Air Base, Japan. The jump rope challenge required all 48 students to jump over the rope while it was in motion. If the rope touched a student while they were jumping over, or if the rope stopped, the students would have to start over again. (U.S. Air Force photo by Staff Sgt. Micaiah Anthony)