The U.S. Air Force Thunderbird approach Air Force recruits during the 2015 Dyess Big Country Airfest May 2, 2015, at Dyess Air Force Base, Texas. As part of their visit to Dyess, Thunderbird No.1, Lt. Col. Christopher Hammond, issued the oath of enlistment to recruits entering the Air Force through the delayed entry program. (U.S. Air Force photo by Airman 1st Class Autumn Velez/Released)