U.S. Air Force Senior Airman Derek Robertson, 1st Operations Support Squadron air traffic controller, carries his free tree to his vehicle during Christmas SPIRIT Foundation’s Trees for Troops program at Joint Base Langley-Eustis, Va., Dec. 5, 2016. Trees for Troops hosted the events at both installations to support both Airmen and Soldiers during the holiday season. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)