As authorities continue to investigate the disappearance of Nancy Guthrie, investigators are scouring her Arizona community for clues in the high-profile case. Pima County Sheriff Chris Nanos told reporters Thursday he believes Guthrie, the 84-year-old mother of Today host Savannah Guthrie, is "still out there," although investigators have no proof she's still alive five days after she was reported missing from her Tucson home. "Right now, we believe Nancy is still out there," Nanos said. "We