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An American flag placed by first responders is seen December 27, 2015 in the aftermath of a tornado in Rowlett, Texas.  At least 11 people lost their lives as tornadoes tore through Texas, authorities said, as they searched home to home for possible more victims of the freak storms lashing the southern United States. The rare December twisters that flattened houses and caused chaos on highways raised the death toll from days of deadly weather across the South to at least 28. AFP PHOTO/LAURA BUCKMAN / AFP / LAURA BUCKMAN        (Photo credit should read LAURA BUCKMAN/AFP/Getty Images)
An American flag placed by first responders is seen December 27, 2015 in the aftermath of a tornado in Rowlett, Texas.  At least 11 people lost their lives as tornadoes tore through Texas, authorities said, as they searched home to home for possible more victims of the freak storms lashing the southern United States. The rare December twisters that flattened houses and caused chaos on highways raised the death toll from days of deadly weather across the South to at least 28. AFP PHOTO/LAURA BUCKMAN / AFP / LAURA BUCKMAN        (Photo credit should read LAURA BUCKMAN/AFP/Getty Images)

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Texas storms unleash tornadoes

Massive December storms unleashed tornadoes, flash floods and ice across the U.S., killing at least 25 people. CNN's Nick Valencia reports.

Texas storms unleash tornadoes

Massive December storms unleashed tornadoes, flash floods and ice across the U.S., killing at least 25 people. CNN's Nick Valencia reports.