An F-16 Fighting Falcon with the U.S. Air Force Aerial Demonstration Squadron Thunderbirds lines up to receive fuel from a 92nd Air Refueling Wing KC-135 Stratotanker over Glacier National Park, Montana, Sept. 1, 2014. The Thunderbirds performed in Kalispell, Montana, hosted by the 2014 Mountain Madness Airshow Aug. 31, 2014. (U.S. Air Force photo/Airman 1st Class Janelle Patiño)