U.S. Air Force Staff Sgt. Samuel Clements, 20th Aircraft Maintenance Squadron avionics specialist, Shaw Air Force Base, S.C. uses light from a headlamp to select an appropriate tool while conducting repairs on an F-16CM Fighting Falcon in support of Red Flag 17-2 at Nellis AFB, Nev., Feb. 28, 2017. Red Flag provides an opportunity for 20th Fighter Wing aircrew and maintainers to enhance their tactical operational skills by exposing them to a simulated combat environment. (U.S. Air Force photo by Senior Airman Zade Vadnais)