A U.S. Air Force Thunderbird flies over Colorado after receiving fuel from a KC-135 Stratotanker, May 29, 2013. The KC-135, assigned to Fairchild Air Force Base, Wash., refueled the Thunderbird team while escorting them to Fairchild for SkyFest 2014. The Thunderbirds squadron is an Air Combat Command unit composed of eight pilots (including six demonstration pilots), four support officers, three civilians and more than 130 enlisted personnel performing in 25 career fields. (U.S. Air Force photo/Senior Airman Mary O'Dell)