In 1958, a nuclear bomb was lost somewhere along the swampy coast of Georgia. Its whereabouts remain a mystery to this day.
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During the Cold War, the US had planned to detonate a nuclear weapon on the moon.
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In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Teddy bears were named after U.S. President Theodore 'Teddy' Roosevelt.
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Americans throw out 4.5 pounds of trash a day - twice that of 40 years ago.
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