Today show host Savannah Guthrie says in a new video that her family is living an unending nightmare nearly six months after her mother’s disappearance and pleads with her kidnappers: “Tell us where to look for her.”The video released on Monday is the latest public plea from the journalist about 84-year-old Nancy Guthrie since her disappearance on February 1 from her home just outside Tucson, Arizona. Savannah Guthrie said her family will never stop looking for her.“The world can be a cruel...