Related: US news

1. More US news
   1. 'Major damage' as huge tornado rips through Okla.
   2. 'Confirmed casualties' at school flattened by tornado
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   5. Anchors flee during live show as tornado hits
2. More top stories
   1. 'Major damage' as huge tornado rips through Okla.
   2. LIVE LOCAL COVERAGE: Twister deals destruction, death
   3. 'Confirmed casualties' at school flattened by tornado
   4. White House aides learned of IRS details in April, but didn’t tell Obama
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3. Related videos
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      Tornado timeline
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      How you can help the victims of the Oklahoma tornado
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      Eyewitness video of tornado's ferocity