A KC-135 "Stratotanker" aircraft is parked in a Pennsylvania Air National Guard hangar during an isochronical inspection at the 171st Air Refueling Wing near Pittsburgh, Sept. 24th, 2021. Aircraft mechanics inspect every square inch of the aircraft for damage or needed repairs during an isochronical inspection. (U.S. Air National Guard illustration by Tech. Sgt. Bryan Hoover) (This image was created using high dynamic range techniques.)

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Photo by: Tech. Sgt. Bryan Hoover |  VIRIN: 210924-Z-EY983-1001.JPG