Savannah Guthrie's 84-year-old mother, Nancy Guthrie, has been reported missing in Arizona. The Guthrie family told NBC News this is a missing persons case and they're working closely with local law enforcement. The Pima County Sheriff's Department confirmed that Nancy was missing during a Sunday, February 1 press conference, calling her a "vulnerable adult." She was last seen Friday, January 31, at her residence in Arizona's Catalina Foothills, and officials said it's unknown what she was we