A Douglas C-124 Globemaster II, the U.S. Air Force's principal heavy-lift troop and cargo transport of the 1950s and 1960s, stands with its distinctive clamshell nose doors open while airmen assemble on the ramp before boarding. Powered by four Pratt & Whitney R-4360 radial engines, the Globemaster II could carry over 200 fully equipped troops or oversized cargo, making it a workhorse of Cold War-era airlift operations for the Military Air Transport Service and Tactical Air Command. Project: 218191