Sochi may attract the fewest American visitors to a Winter Olympics in 20 years amid terrorism concerns, a lack of luxury hotel rooms and difficulties procuring visas, according to U.S. tour operators. Russia’s plan to spend $50 billion on hotels and other infrastructure to convert a small city on the Black Sea into a year-round resort hasn’t resulted in enough high-end hotels, and the existing facilities have raised prices by 121 percent for the event, according to trivago.co.uk, a U.K. website.

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