U.S. Air Force Airman 1st Class Kenneth Overfelt, 52nd Maintenance Support Squadron F-16 Phase Support team member, checks M8 chemical agent detection paper for contamination during an exercise at Spangdahlem Air Base, Germany, Sept. 11, 2018. The week-long exercise stressed the importance of readiness in a chemical, biological, radiological, or nuclear contaminated setting. (U.S. Air Force photo by Airman 1st Class Valerie Seelye)