Photograph of a U.S. Air Rescue Service Boeing B-17 Flying Fortress aircraft at an airfield, circa 1940s-1950s. Another aircraft is visible in the foreground.
Photograph of a Boeing B-17G Flying Fortress aircraft, circa 1960s. The sign on the aircraft's nose reads: " Geophysical Institute University of Alaska Solar Eclipse Expedition / July 20, 1963 / Aero Service Corporation."