BBC - Heroes and Weapons of WWII 2004 -
Overview:At the outbreak of World War II, the only heavy four engined bombers in the war were either Russian or American. Soon the Short Stirling, the Avro Lancaster, and the Liberator were added to the B-17 Flying Fortress for devastating 1000 bomber raids over Germany. Ultimately, the pressurised B-29 gave the Americans the range and height they required in order to drop the Atomic bomb.
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