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This weekend, one of the most watched sporting events of the year, the Super Bowl, will draw an estimated $16 billion in bets from Americans, more than double last year\u2019s total.\n\nThe booming trade is a sign of how gambling has gone from illegal to legal very quickly in many states \u2014 and hints at the enormous risks posed by the change.\n\nGuest: Kenneth P. Vogel, an investigative correspondent for The New York Times.