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But by 1819, Baltimore had the first bicycle shop in the United States. Soon craftsmen across the United States and Europe were improving on Drais’s ideas. Today, there are more than a billion bicycles worldwide, with about 70 million in the United States, according to the Department of Transportation.
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https://www.washingtonpost.com/wp-dyn/content/article/2010/09/14/AR2010091406212.htmloldId.20100916060534423
Biking in Baltimore