San Francisco 49ers fans celebrate a touchdown with running back Carlos Hyde on Monday in Santa Clara, Calif. Tony Avelar/AP hide caption

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Internet gambling has become legal in New Jersey and Nevada, but experts say enforcement and regulations still need to be straightened out. Jim Mone/AP hide caption

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Booths that sell paper pull-tab games like this one have new competition in Minnesota: electronic pull-tab games played on iPads. The games are meant to help pay for a new football stadium in Minneapolis. Jim Mone/AP hide caption

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