With Tropical Storm Erin expected to become a major hurricane by the end of the week, Ginger Zee has the track and Ike Ejiochi reports on the drownings in the Northeast that triggered rip current warnings as the storm churns in the Atlantic; Trevor Ault has details on what police investigating the deadly shooting outside a Target in Austin, Texas, said about how the suspect chose his victims – an employee collecting carts, then a grandfather and his four-year-old granddaughter – at random; as