U.S. Air Force Tech. Sgt. Andrew Chilcoat, a 437th Airlift Wing Air Traffic Safety Electronics Personnel (ATSEP) evaluator, monitors as Airmen offload cargo from a C-17 Globemaster III at McEntire Joint National Guard Base, S.C., Nov. 16, 2020. Palmetto Challenge is a global mobilization exercise held at McEntire Joint National Guard Base, S.C., and Pope Army Airfield, N.C. The exercise is held in order to develop readiness and awareness in a simulated deployed environment for over 100 Airmen from Joint Base Charleston.