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A thriving business worldwide, casino gaming attracts millions of visitors every year. In the United States, the industry generates $261 billion in annual revenue and employs just north of 1 million people. The ten largest casino-hotels in the world can each comfortably accommodate more than 20,000 gamblers at any given time, and some of them have sprawling grounds that include opulent restaurants, designer shops and top-billed entertainment shows.
Because of the large amount of money handled within casino premises, employees and patrons alike may be tempted to cheat or steal, either in collusion with one another or independently. To counter this, modern casinos usually have a combination of physical security forces and a specialized surveillance department that operates a closed circuit television system. These measures have proved very effective in reducing crime in casinos.