PARIS -- The first Summer Olympic Games in Paris in 100 years kicked off Friday with a one-of-a-kind opening ceremony held on the city's main artery celebrating the cultural diversity of France, a marathon of a show that pushed the boundaries of what is possible in Olympic ceremonies. Some 6,800 athletes from 205 national delegations, including the Refugee Olympic team, marked the start of the 17-day competition by riding boats equipped with cameras on a 6-kilometer floating parade on the