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fireworks
worldofchemicals
    The Chemistry of #Fireworks Featuring John Conkling, Ph.D. - Bytesize Science - YouTube http://buff.ly/1mLdo5E
    jaredsartin
      Flashback to the opening ceremony fireworks because they were just that good. #latergram #fireworks #olympics #sochi2014 #fisht by georgiasap http://ift.tt/1gs22ki