Mastering the jump
Master Sgt. David Biddinger, a 563rd Rescue Group jumpmaster course instructor, performs a jumpmaster personnel inspection during the Military Freefall Jumpmaster Course at Davis-Monthan Air Force Base, Ariz., June 28, 2016. Jumpmasters must be highly proficient in every component of the jump process, from ensuring equipment is donned properly to coordinating with the aircrew during the release so jumpers land on the designated drop zone. (U.S. Air Force photo/Airman Nathan H. Barbour)