It has been 12 days since Nancy Guthrie , the mother of "Today" show host Savannah Guthrie, disappeared , and key questions about what happened — and why — remain unanswered. Authorities believe 84-year-old Nancy Guthrie, who has limited mobility, a pacemaker, and relies on daily medication for a heart condition, was abducted from her Arizona home in the middle of the night. Photos and videos recovered from her missing Nest doorbell camera show a fully masked person , who authorities say was