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Story summary
- Pima County officials reported no new leads in the search for Nancy Guthrie, who has been missing for 20 days from her Arizona home.
- Nancy Guthrie is the mother of Savannah Guthrie, co-host of NBC's Today show.
- CBS News reporter Andres Gutierrez is in Tucson providing updates on the situation.
- The lack of leads sustains ongoing search efforts as authorities continue to look for Guthrie.
