U.S. Air Force Staff Sgt. Kirk Clark, 422nd Security Forces Squadron investigator, ties caution tape around simulated car bomb location during the 501st Combat Support Wing Readiness Exercise 20-01 at RAF Croughton, England, Feb. 12, 2020. The exercise tested the wing’s preparedness and response capabilities to an emergency situation. (U.S. Air Force photo by Airman 1st Class Jennifer Zima)