Authorities have entered their third week in the search for Nancy Guthrie, the 84-year-old mother of 'Today' show host Savannah Guthrie, who is believed to have been abducted from her home near Tucson, Arizona on Jan. 31. NewsNation Senior National Correspondent Brian Entin has been following the search since the beginning and joins JB Biunno and the WFLA Stream Center team for a live Q&A. NANCY GUTHRIE SEARCH LATEST: https://www.wfla.com/news/national/heyjblive-live-qa-with-newsnations-brian-entin-on-latest-developments-in-nancy-guthrie-search/...