NBC News' Liz Kreutz brings the newest developments on Savannah Guthrie's missing 84-year-old mother Nancy Guthrie in Arizona. Also, tens of millions brace for bitter cold temperatures up and down the east coast as parts of the south enter a second week without power and heat. Plus, the Clintons have agreed to testify before a House Committee in the latest fallout on the Jeffrey Epstein investigation. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.