A Survival, Evasion, Resistance, and Escape (SERE) specialist, sits on a CH-47 Chinook before performing a static-line jump over the Nevada Test and Training Range, during Red Flag 17-2, March 7, 2017. A static line is a fixed cord attached to a large, stable object and is used to open parachutes automatically. (U.S. Air Force photo by Airman 1st Class Kevin Tanenbaum/Released)