The United States Air Force Thunderbirds and Patrouille de France fly together over Death Valley, Calif., April 17, 2017. The Thunderbirds and Patrouille de France are two of the oldest aerial demonstration teams in the world. (U.S. Air Force Photo by Tech. Sgt. Christopher Boitz)

Maj. Nick Krajicek, a T-38 Talon pilot, flies in a two-ship formation with retired Lt. Col. Dale Cooke, a former T-38 pilot, over Tyndall Air Force Base and Panama City, Fla., April 21, 2017. The T-38 in the formation was the same jet Cooke flew during his tenure on the team. The Thunderbirds transitioned from the T-38 to the F-16 in 1982. (U.S. Air Force Photo/Tech. Sgt. Christopher Boitz)