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Key Facts In This Video
A nuclear blast that occurs in space can set off a high-altitude electromagnetic pulse, or EMP. 00:16
In 1958, the USSR called for a ban on high-altitude nuclear testing, but the ban was overturned in 1961. 02:10
When the Starfish Prime hydrogen bomb was detonated at high altitude, it set off burglar alarms in Hawaii, which was more than 620 miles (1,000 km) away. 02:36
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