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FILE - In this Nov. 26, 1989 file photo two members of the Czech riot police, who took part in violently subduing a demonstration of students on Nov. 17 in Prague apologize at a mass rally of civic forum supporters in Prague, Czechoslovakia. Hundreds of thousands of people heard their confession. With their country in deep political crisis, Czechs on Tuesday, Nov. 17, 2009 throughout the country commemorate the 20th anniversary of the so-called Velvet Revolution that marked the end of decades of repressive communist rule. Nov. 17, 1989, began with fiery speeches at a university campus in Prague, inspiring thousands of students to march downtown toward Wenceslas Square the following days. (AP Photo/Antonin Novy, File)