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Residents eat at a disaster relief center after a tornado struck in Marysville, Ind., Sunday, March 4, 2012. Calm weather gave dazed residents of storm-wracked towns a respite on Sunday as they dug out from a chain of tornadoes that cut a swath of destruction from the Midwest to the Gulf of Mexico, killing at least 39 people. (AP Photo/Nam Y. Huh)

Twisters leave trail of tears

In what may be the biggest daily tornado outbreak on record for March, an entire month's worth of twisters struck in a single day.