U.S. Air Force Tech. Sgt. Chance Watson, an avionics

U.S. Air Force Tech. Sgt. Chance Watson, an avionics technician assinged to the 169th Aircraft Maintenance Squadron runs checks in the cockpit of an F-16 Fighting Falcon fighter jet at McEntire Joint National Guard Base, S.C., Jan. 18, 2017. The South Carolina Air National Guard’s 169th Aircraft Maintenance Squadron’s F-16 Avionics shop received its annual Combat Shield evaluation, Combat Shield evaluates the reliability of the jet’s radar threat warning system, electronic countermeasure, and high-speed anti-radiation missile targeting system pods. Each component is crucial to the success of the F-16 fighter pilot in combat situations. (U.S. Air National Guard photo by Airman 1st Class Megan Floyd)