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The Mississippi River remains what it always was—a kind of huge rope, no matter with what knots and frayings, tying the United States together. It is the Nile of the Western Hemisphere. -- John Gunther How much do you know about the Mississippi River? Test your knowledge in one of the following three categories: Geography Natural History People and Culture Photo: The Chain of Rocks Bridge, built in 1929 north of St. Louis, MO Mississippi River Basin Alliance