U.S. Air Force Staff Sgt. Christian Brancato, a Brazilian Jiu-Jitsu coach, ties a stripe to one of his students’ belts during a class Nov. 7, 2019, at Incirlik Air Base, Turkey. In the martial arts world, practitioner’s ranks are coded by the color of their belts, while the stripes on those belts signify tiers within those ranks. (U.S. Air Force photo by Staff Sgt. Joshua Magbanua)