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Missing in the Mudslide: A Brother's Mission to Find His Sister

Dayn Brunner is determined to keep searching, even as hopes for a rescue begin to fade.
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Time is running out for the those still missing in the Washington state mudslide. As each day passes, the search grows more desperate -- and for Dayn Brunner, the mission is now to find closure.

His sister, 36-year-old Summer Raffo, has been missing since Saturday. Brunner, 42, has been looking for her every day since. In the video below, he shares his determination to keep searching.

Watch "Nightly News with Brian Williams" tonight for more on the dangerous search in Washington state.