Morgan Norwood reports on the dangerous flood threat across the South and the Plains after Tropical Storm Arthur inundated roads and neighborhoods; Selina Wang has the latest dispute over the critical Strait of Hormuz as a new round of peace talks gets underway with Iranian and U.S. officials touching down in Switzerland; Jaclyn Lee has the disturbing new police body camera showing an officer opening fire and killing a family dog following a 911 call about a woman screaming; and more on tonight’