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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

January 1, 1970

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.