Moscow, Russia, 19/05/2012..Police guarding the Russian Federal Agency for Print and Mass Communication watch an artwork consisting of suitcases fashioned to look like a gun and bearing the work ?kompromat?, Russian jargon for compromising material, as several thousand artists and opposition activists demonstrate against Vladimir Putin by walking through Moscow transporting their artworks. The protest coincided with Museum Night, when Moscow's museums are open until midnight with special exhibitions and performances.
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