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General Groves spent $12 million on Jumbo, a steel cylinder 10 feet in diameter and 25 feet long. Its walls were 14 inches thick and the entire device weighed 200 tons.
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General Groves spent $12 million on Jumbo, a steel cylinder 10 feet in diameter and 25 feet long. Its walls were 14 inches thick and the entire device weighed 200 tons.
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