Savannah Guthrie and her siblings are speaking out after their mother, 84-year-old Nancy Guthrie, was reported missing in Arizona. In an Instagram video, Savannah, sister Annie and brother Camron thanked people for prayers and described Nancy as "kind" and "fiercely loving." Savannah said they've heard reports of an alleged ransom letter sent to TMZ and other outlets. She said the family is "ready to talk," but needs proof Nancy is alive because "voices and images are easily manipulated." Th