Online reviews are many, but it's often difficult to tell the real ones from the fakes. To help sort the genuinely delighted customers from profit-driven praise, researchers at Cornell University have developed software that can successfully tell the difference. Yanik Chauvin/iStockphoto hide caption

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This NOAA satellite image shows Hurricane Irene as it approached the East Coast on Friday. AFP/Getty Images hide caption

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Passengers wait in line at the United Airlines terminal at Chicago's O'Hare airport in 2009 after a computer malfunction caused long delays and the cancellation of some United flights. Scott Olson/Getty Images hide caption

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Clyde Jackson (right) poses for a photo with his son, Clyde Jr., outside their new two-bedroom apartment in Greenbelt, Md. Jackson lost his three-bedroom home to foreclosure in December. Alex Kellogg/NPR hide caption

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California Rep. Xavier Becerra was one of six Democrats chosen to join six Republicans on a panel tasked with finding a way to cut about $1 trillion from the federal deficit. Kris Connor/Getty Images hide caption

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A house, like this one in Miami, represents a part of the American dream. But should the government help people attain it? Alan Diaz/ASSOCIATED PRESS hide caption

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President Obama listens to questions at a town-hall-style meeting in Decorah, Iowa, on Monday. The president took a three-day bus tour through the Midwest to talk about the economy. Jim Watson/AFP/Getty Images hide caption

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High-speed trades that outpace human decision-making are unhealthy for the markets, critics say. Andrew Burton/Getty Images hide caption

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Michigan Department of Human Services caseworker Sandy Satchel works at the Family Independence Agency in Detroit. In the past few years, welfare caseloads have dropped 2 percent in Michigan while unemployment has risen 54 percent, a trend that's reflected in other states. Carlos Osorio/AP hide caption

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Express Scripts and Medco Health Services say their merger will help control prescription drug costs. But many prescriptions may only be available by mail, which may not sit well with some consumers. Sean Locke/iStockphoto.com hide caption

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