Boeing C-97/KC-97 Stratofreighter aircraft line the ramp at an Air National Guard installation, likely in California, during the late 1950s to mid-1960s. Developed from the B-29 Superfortress airframe, the C-97 family served the Guard in both cargo/transport and aerial-refueling tanker roles, bridging the transition from piston-engine to jet-age airlift. Project: 218665