Lt. Col. Jason Heard, commander/leader of the U.S. Air Force Thunderbirds Air Demonstration Squadron and pilot of the No. 1 jet signs autographs after completing a performance during the Thunder Over Dover Open House Aug. 27, 2017, at Dover Air Force Base, Del. The Thunderbirds demonstrated the versatility of the F-16 Fighting Falcon by performing aerial acrobatics, precision formations and high-speed passes during their performance. (U.S. Air Force photo by Senior Airman Zachary Cacicia)