URL：https://get.pxhere.com/photo/airplane-aircraft-vehicle-aviation-flight-war-soldiers-bomber-douglas-historically-langley-boeing-maintenance-virginia-1942-air-force-world-war-ii-fighter-aircraft-military-aircraft-atmosphere-of-earth-aircraft-engine-propeller-driven-aircraft-boeing-b-17-flying-fortress-north-american-b-25-mitchell-havoc-battle-bomber-a-20-c-bo-1142480.jpg
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