U.S. Air Force Senior Airman Erickson Zinger, 786th Civil Engineer Squadron Emergency Management training journeyman, center, explains to Airmen how to safely remove their Mission-Oriented Protective Posture boot covers at Ramstein Air Base, Germany, Dec 11, 2019. Airmen donned MOPP gear during exercise Operation Varsity 19-04. MOPP gear is used to protect Airmen from chemical, biological, environmental, radiological attacks, which allows mission continuation. (U.S. Air Force Photo by Senior Airman Kaylea Berry)