Answer :
Construction on the Bell Bomber Plant, also known as the Marietta B-29 Plant, started in late 1942, during World War II, as the Bell Bomber Plant was built by the US government to produce B-29 Superfortress bombers.
The construction of the Bell Bomber Plant was completed in record time, and the first B-29 bomber rolled off the assembly line in September 1944. The plant produced a total of 668 B-29 bombers during its operation, making a significant contribution to the US war effort. After the end of World War II, the plant was used for various purposes, including the production of commercial aircraft and military helicopters. The plant was eventually sold to Lockheed Martin Corporation and continues to operate as a major aerospace manufacturing facility.
Learn more about the Bell Bomber Plant here.
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