This photograph shows a Boeing C-97 Stratofreighter of the California Air National Guard on the flight line, its bold 'CALIF. AIR GUARD' markings and four powerful radial engines on full display. Derived from the B-29 Superfortress and sharing its fuselage design with the civilian Boeing Stratocruiser, the C-97 served Air National Guard units as a vital heavy-lift transport throughout the 1950s and 1960s Cold War era. Project: 218665