A search and rescue dog works the area of a massive mudslide on March 29, 2014 in Oso, Wash.

David Ryder—Getty Images

A search and rescue dog works the area of a massive mudslide on March 29, 2014 in Oso, Wash.

A search and rescue dog works the area of a massive mudslide on March 29, 2014 in Oso, Wash.

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