LEXINGTON, KY, USA - JULY 20, 2013 Boeing B-17 bomber on display at the Aviation Museum of Kentucky in Lexington The Boeing B-17 Flying Fortress is a four-engine heavy bomber aircraft developed in the 1930s for the United States Army Air Corps

LEXINGTON,  KY,  USA  - JULY 20, 2013  Boeing B-17 bomber on display at the Aviation Museum of Kentucky in Lexington  The Boeing B-17 Flying Fortress is a four-engine heavy bomber aircraft developed in the 1930s for the United States Army Air Corps  - 22034399

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