Usain Bolt plans to retire after the 2016 Rio de Janeiro Olympics.Bolt said on Wednesday that he wants to win more gold in Rio, set another world record in the 200 meters next year, and perhaps win a gold medal at the Commonwealth Games. Winning another three golds in Moscow last month made him the most decorated athlete in world championship history with eight gold and two silvers. He has six gold medals from the Olympics. Bolt won the 100, 200 and 4×100 relay at the 2008 Beijing Olympics and at last year's London Games. He won the same triple at the 2009 worlds before repeating that feat in Moscow last month.