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  Storm survivors take stock of belongings

Scientists investigate twisters like detectives

Weather scientists are retracing the footprints of this week's monstrous tornadoes the way detectives would investigate a crime scene: talking to witnesses, watching surveillance video and even taking the measurements of the trees ripped from the ground. Full story

Tornado leaves wake of devastation

  Rachel Maddow reports on the multi-state swath of devastation left by a tornado and how viewers can help fund the recovery effort.

Man behind tornado video speaks

  The man behind the stunning footage of a massive tornado ripping through Tuscaloosa, Alabama, Christopher England, joins Richard Lui to discuss coming within 200-300 yards of a tornado estimated to be a quarter of a mile wide.

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