A riverboat casino is seen in Davenport, Iowa March 29, 2011. Davenport, one of the Quad Cities on the border of Illinois and Iowa, lies on the Mississippi River and is a part of America's Midwestern "Rust Belt", the heartland of the country and home to big unionized manufacturers like the auto and steel industries. Riverboat gambling, a boost to the local economy after a period of economic downturn, recently celebrated its 20th anniversary in Iowa. Picture taken March 29, 2011....
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A riverboat casino is seen in Davenport, Iowa March 29, 2011. Davenport, one of the Quad Cities on the border of Illinois and Iowa, lies on the Mississippi River and is a part of America's Midwestern "Rust Belt", the heartland of the country and home to big unionized manufacturers like the auto and steel industries. Riverboat gambling, a boost to the local economy after a period of economic downturn, recently celebrated its 20th anniversary in Iowa. Picture taken March 29, 2011. REUTERS/Eric Thayer (UNITED STATES)
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