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10 terrifying twisters

By: Laura Moss on July 30, 2010, 12:05 p.m.
tornado forms over Arkansas field

Photo: Paul McIntosh/AP

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Keo, Arkansas

A funnel cloud forms over a field in Keo, Ark., on April 10, 2008. A band of hail, heavy rain and twisters pounded Arkansas, Texas and Oklahoma, damaging hundreds of homes, flooding roads and leaving thousands without power.