nine months ago. >> yeah it's a tonight, several developing stories as we come on. the summer slam. extreme weather across the country. deadly flash floods in the heartland. the tornado threat. and the heat wave. more than 100 million americans sweltering, as we barrel toward the fourth of july. the deadly tour boat explosion. ten americans on board. the boat completely engulfed in flames. a scramble to rescue the passengers. one tourist would not survive. the stabbing spree. nine injured, six of them children, when a suspect started slashing residents at a child's birthday party. what authorities are revealing about a possible motive. supreme court showdown. the president back at the white house. tonight, facing a pivotal decision about who he nominates to the high court. and what he said about his pick,