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Prague, Czechoslovakia. Marchers progress slowly along Narodni Blvd. during a celebration in Prague on November 17, 2009, honoring 20th anniversary of the day that the 6-week-long Velvet Revolution began. The Revolution, which resulted in the overthrow of Communism in Czechoslovakia, was triggered at this same spot on Narodni Blvd., 20 years earlier, after a peaceful protest by students was viciously attacked by Czech Police. Photo by Deirdre Hamill/Quest Imagery.