On April 26, 1986, a fire and explosion at the Soviet Union's Chernobyl nuclear reactor north of Kiev, Ukraine, resulted in the world's worst civilian nuclear disaster. On This Day, April 26: Chernobyl nuclear reactor explodes in Ukraine
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On April 26, 1986, a fire and explosion at the Soviet Union's Chernobyl nuclear reactor north of Kiev, Ukraine, resulted in the world's worst civilian nuclear disaster. 
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