The man who sounded the alarm in Moore, Okla.

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The man who sounded the alarm in Moore, Okla.

The man who sounded the alarm in Moore, Okla.
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The man who sounded the alarm in Moore, Okla.

CBSTV Videos 2:13 mins

Chief forecaster David Andra for the National Weather Service in Norman, Okla., was tracking the storm as it approached Moore, Okla. -- where his daughter's family lives. Andra sent the warning for people to get to shelter. Mark Strassman shares his story.

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