U.S. Air Force Airman 1st Class Kevin Johnson and U.S. Air Force Tech. Sgt. Adam Elerson, 52nd Aerospace Medicine Squadron mock post attack reconnaissance team members, prepare to do a PAR sweep after an explosion was reported at Spangdahlem Air Base, Germany, March 15, 2018. PAR teams complete sweeps after a simulated attack to identify hazards. (U.S. Air Force photo by Airman 1st Class Jovante Johnson)