Zhores Medvedev
Medvedev exposed the Kyshtym nuclear disaster, which happened at Mayak near Kyshtym, Ozyorsk, Chelyabinsk Oblast in the Urals in 1957. He published the book The Nuclear Disaster in the Urals in 1979. He and his brother Roy were forced to move to London. The two also coauthored Khrushchev: The Years in Power (1978) and several other books, the last one The Unknown Stalin (2007).