FBI Uses DNA to Search for Nancy Guthrie After Arizona Kidnapping

Authorities use DNA and genealogy to find Nancy Guthrie's kidnapper after she vanished from her Arizona home three weeks ago.FBI investigators are analyzing surveillance of a masked suspect in a Walmart backpack and a bloody glove while processing 20,000 tips.Internal tensions between Chris Nanos and federal partners complicate the search for the mother of "Today Show" host Savannah Guthrie.