A United States Air Force Air Demonstration Squadron "Thunderbirds” maintenance member readies a jet for takeoff in preparation for the Commander of Air Combat Command's certification, March 23, 2021 at Langley Air Force Base, Virginia. The commander's certification is required in order for the team to perform in front of large civilian crowds, and certifies the safety of the demonstration. (U.S. Air Force Photo by Staff Sgt. Laurel Richards)
