Geologist Explains Deadly Washington Mud Slide

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Geologist Explains Deadly Washington Mud Slide

by Associated Press Videos 1:13 mins

Geologist Explains Deadly Washington Mud Slide

by Associated Press Videos 1:13 mins

David Montgomery, a geology professor at the University of Washington, talks about what caused the deadly weekend landslide that killed at least two dozen people and left scores missing. (March 28)

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