VO and VO SOT Take (TK) Video Lester: CU TAKE A LOOK AT THIS.. VO A HUGE SANDSTORM BLANKETS CHINA'S GANSU PROVINCE IN JUST A MATTER OF MINUTES. WIND GUSTS OF MORE THAN 45 MILES AN HOUR SWEPT THE WALL OF DUST THROUGH THIS NORTHWESTERN CHINESE CITY. VISBILITY DROPPED TO A LITTLE UNDER A MILE …