Duh-what-choo? Find out more about the possible derecho threatening millions of Americans.
A massive line of fierce storms forecast to wallop the Midwest and Mid-Atlantic on Wednesday and Thursday has meteorologists warning about the possibility of a derecho.
National Archives and Records Administration
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Jason Merritt/Getty Images for The Honest Company
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From Pilgrim's Pride via CNN
Joe Raedle/Getty Images, NBC Universal/'Maury’ via CNN
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