"Indian gambling in the United States is big business. Since Congress passed an Indian gambling law in 1988, the industry has grown to the point where more than 220 tribes in 28 states raked in $18.5 billion last year. That's about twice the take from Las Vegas' glittering casinos.

While the spread of the slots may give pause to some Americans, many observers think Indian gambling has been a boon to Native Americans.

But if you thought only tribes are getting rich from casinos, you would be wrong."

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Editorial: Vigilance on gaming expansion (The Denver Post 4/22)