One year ago: The head of the Arab League, Nabil Elaraby, urged members to confront Islamic State extremists "militarily and politically." A star-studded funeral was held in New York for comedian Joan Rivers, who had died three days earlier at age 81. Serena Williams won her third consecutive U.S. Open championship and 18th major title overall, taking 75 minutes to beat good friend Caroline Wozniacki 6-3, 6-3.