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Image #: 22426417    A shredded tree stands amid debris after a massive tornado touched down in the town of Moore, near Oklahoma City, Oklahoma May 20, 2013.  A huge tornado with winds of up to 200 miles per hour (320 kph) tore through the Oklahoma City suburb of Moore on Monday, ripping up at least two schools and leaving a wake of tangled wreckage as a dangerous storm system threatened as many as 10 U.S. states.   REUTERS/Richard Rowe (UNITED STATES - Tags: DISASTER ENVIRONMENT)       Reuters /STRINGER /LANDOV
Image #: 22426417    A shredded tree stands amid debris after a massive tornado touched down in the town of Moore, near Oklahoma City, Oklahoma May 20, 2013.  A huge tornado with winds of up to 200 miles per hour (320 kph) tore through the Oklahoma City suburb of Moore on Monday, ripping up at least two schools and leaving a wake of tangled wreckage as a dangerous storm system threatened as many as 10 U.S. states.   REUTERS/Richard Rowe (UNITED STATES - Tags: DISASTER ENVIRONMENT)       Reuters /STRINGER /LANDOV

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Rescuer: It's a fight or flight response

CNN's Nick Valencia interviews an Oklahoma survivor that rescued his trapped neighbor.

Rescuer: It's a fight or flight response

CNN's Nick Valencia interviews an Oklahoma survivor that rescued his trapped neighbor.