A flight engineer monitors the dense array of engine and fuel instruments aboard a Boeing C-97 Stratofreighter, the military transport variant of the Boeing Stratocruiser. Tasked with managing the aircraft's four powerful piston engines and complex fuel system, the flight engineer was an essential member of the C-97's aircrew. This photograph, part of an April 1960 series, documents California Air National Guard air and ground crews training and operating these long-range transports. Project: 218665