The Chernobyl disaster occurred at 01:23 a.m. on April 26, 1986 at the Chernobyl nuclear power plant in Pripyat, Ukraine within the Soviet Union. It is regarded as the worst accident in the history of nuclear power. Because there was no containment building, a plume of nuclear fallout drifted over parts of the western Soviet Union, Eastern and Western Europe, Scandinavia, the British Isles, and eastern North America. Large areas of Ukraine, Belarus, and Russia were badly contaminated, resulting in the evacuation and resettlement of over 336,000 people. About 60% of the radioactive fallout landed...