SYDNEY : Australia's most decorated Olympian, Emma McKeon, announced her retirement from all forms of swimming on Monday, bringing an end to a glittering career in which she won 14 medals at three Olympics and 20 at world championships. The 30-year-old sprinter had signalled her retirement earlier this year at the Paris Olympics after winning a gold, silver and bronze in relays to help Australia to its most successful Summer Games. "I will definitely miss it ... It's brought me a lot of great