On August 25, 1968, he and seven other dissidents organized the now-famous demonstration in support of the Prague Spring in Red Square near the Moscow Kremlin.
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Bogoraz became well known when, on August 25, 1968, she organized seven people to protest in Red Square against the Soviet Union's invasion of Czechoslovakia at the 1968 Red Square demonstration, together with Pavel Litvinov, Natalya Gorbanevskaya, Vadim Delaunay and other protesters.