Chicago river dyed green in St. Patrick's Day tradition

Spectators watch in awe as the Chicago River turns green ahead of St. Patrick's Day. According to Reuters, the Chicago Journeymen Plumbers Local Union 130 pours 40 pounds of dye into a quarter-mile stretch of the river to achieve this striking color. The union says that the dye is non-toxic and safe for wildlife. #cnn #news #stpatricksday