ST. LOUIS, MISSOURI - SEPTEMBER 18: Tourists at the historic Gateway Arch on September 18, 2010 in St. Louis, Missouri. The Arch is made of steel and is 630 feet high.
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ST. LOUIS, MISSOURI - SEPTEMBER 18: Tourists at the historic Gateway Arch on September 18, 2010 in St. Louis, Missouri. The Arch is made of steel and is 630 feet high.