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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As States Embrace Online Gambling, Questions Arise

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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

toggle caption Jim Mone/AP