Winter Olympic Games records were set in speed skating largely due to the introduction of the clap skate. The 2002 Winter Olympics were held in Salt Lake City, United States, hosting 77 nations and 2,399 athletes in 78 events in 7 sports. These Games were the first to take place since the September 11 attacks of 2001, which meant a higher degree of security to avoid a terrorist attack. The opening ceremony saw signs of the aftermath of the events of that day, including the flag that flew at Ground Zero, NYPD officer Daniel Rodríguez singing "God Bless America", and honour guards of
Winter Olympic Games before the opening ceremonies. Taiwan returned to Olympic competition at the 1984 Winter Games in Sarajevo as Chinese Taipei. The country agreed to compete under a flag bearing the emblem of their National Olympic Committee and to play the anthem of their National Olympic Committee should one of their athletes win a gold medal. The agreement remains in place to this day. The Olympic Charter limits winter sports to "those ... which are practised on snow or ice." Since 1992 a number of new sports have been added to the Olympic programme; which include short track speed skating, snowboarding, freestyle