Japanese Vengeance Balloon Bombs of WW2

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During the Second World War the Japanese conceived the idea of fashioning incendiary bombs and attaching these to balloons which were released with easterly wintertime jet stream winds above 30,000 feet to float 5,000 miles across the north Pacific. The idea was to have these devices explode over the forested regions of the Pacific Northwest and initiate large forest fires that would hopefully divert U.S. manpower from warfighting in the Pacific theater to combating fires at home.