U.S. Air Force Airmen from the 52nd Fighter Wing board a bus during a simulated deployment at Spangdahlem Air Base, Germany, Dec. 17, 2019. The small team of Airmen conducted an Agile Combat Employment exercise on the Spangdahlem flightline in an effort to deter potential threats. Deployments and exercises demonstrate the U.S. military's contribution to regional security and reassure allies. (U.S. Air Force photo by Airman 1st Class Valerie Seelye)