WE ARE COMING ON THE AIR TONIGHT WITH A NEW VIDEO FROM SAVANNAH GUTHRIE, WHO IS SO CLOSE TO OUR HEARTS HERE AT NBC NEWS AND CLOSE TO HER HEART, OF COURSE, HER MOTHER. AND AN EMOTIONAL TRIBUTE TO NANCY AS INVESTIGATORS SAY, THEY'RE EXPANDING THEIR SEARCH, ASKING FOR VIDEO OVER A CERTAIN TIME FRAME. AS WE'RE GETTING NEW DETAILS ON SOME OF THE EVIDENCE THEY'VE RECOVERED.WE'RE GOING TO TAKE YOU LIVE TO TUCSON, PLUS ICE OUT OF MINNEAPOLIS. WHY. IT'S A TALE OF TWO NARRATIVES.WITH DHS POSSIBLY SHUTTING DOWN AS SOO ...