CNN Explains: Political conventionsCNN's Candy Crowley breaks down the ins and outs of political 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2012true2012/08/222012/08/22cnnexplains.crowley.political.conventionsCNNhttp://us.cnn.com/video/data/3.0/video/politics/relateds.xmlfalseDrama is rare in modern conventionsMemorable convention moments3:23nofalse