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Czechoslovak leaders (from left) president Ludvik Svoboda, communist party leader Alexander Dubcek, premier Oldrich Cernik and Parliament speaker Josef Smrkovsky wave to their Soviet counterparts leaving on the train after crucial negotitations on political reforms in Czechoslovakia in Cierna nad Tisou at the Czechoslovak-Soviet border, August 1, 1968. CTK Photo/Jiri Finda. (KEYSTONE/CTK/Jiri Finda)