Heartbreaking: Savannah Guthrie's Mother Disappears; ' Crime Scene'

<![CDATA[Unimaginable. Nancy Guthrie, the mother of NBC News anchor Savannah Guthrie, went missing from her Arizona home over the weekend. When family members could not contact her yesterday, police began a search for the 84-year-old woman, described as "sharp as a tack" but reliant on daily medication to survive. ]]>