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Solzhenitsyn became a celebrity in the Soviet Union, pictured here with the Belarusian writer Vasil Bykau in 1967. After the hard-line Leonid Brezhnev replaced Khrushchev in 1964, Solzhenitsyn received greater scrutiny from the KGB. But internationally his reputation soared and, in 1970, he was awarded the Nobel Prize for Literature.