As Labor Day weekend begins, Trevor Ault has details on the powerful storm pushing east that's threatening travel plans for millions on the unofficial last weekend of summer, and Lee Goldberg has the forecast; Ike Ejoichi reports on the tragic deaths on NHL star Johnny Gaudreau and his younger brother, Matthew, who police say were struck and killed by a suspected drunk driver while biking just hours before they were to be groomsmen in their sister's wedding; as the Israeli military operation in the West Bank enters a third day, Britt Clennett reports on the Hamas commander and two militants who were killed by Israeli forces, according to IDF; and more on tonight's broadcast of World News Tonight.