U.S. Navy flight demonstration squadron, the Blue Angels, Diamond pilots perform the Double Farvel maneuver during a practice for the Sioux Falls Airshow, Power on the Prairie.

SIOUX FALLS, S.D. (Jul. 22, 2016) U.S. Navy flight demonstration squadron, the Blue Angels, Diamond pilots perform the Double Farvel maneuver during a practice for the Sioux Falls Airshow, Power on the Prairie, July 22. The Blue Angels are scheduled to perform 58 demonstrations at 30 locations across the U.S. in 2016, which is the team's 70th anniversary year. (U.S. Navy photo by Mass Communication Specialist 1st Class Andrea Perez) File# 160722-N-WJ386-124