U.S. Air Force Staff Sgt. Cody Bettac, Air Combat Command Headquarters cybersystem operations supervisor, straps a Christmas tree to his vehicle during the Christmas SPIRIT Foundation’s Trees for Troops program at Joint Base Langley-Eustis, Va., Dec. 1, 2017. Since 2005, the program has donated over 176,000 trees at more than 65 military installations in the U.S. and overseas. (U.S. Air Force photo by Staff Sgt. Teresa J. Cleveland)