U.S. Air Force Col. Eric Rivera, U.S. Air Forces Central Command air reserve component advisor, coins two Airmen outside the 380th Air Expeditionary Wing headquarters building Al Dhafra Air Base, United Arab Emirates, Feb. 7, 2018. The origin of coining Airmen dates back to World War I, however nowadays they are used as mementos to recognize the outstanding performance and hard work of service members. (U.S. Air Force photo by Airman 1st Class D. Blake Browning)