1. Crowning the most decorated Olympic athlete of all time
Michael Phelps ended his remarkable swimming career by winning four gold and two silver medals in London. He is now the most decorated Olympian ever, with a career total of 22 medals, 18 of them gold. In his final swim, he helped the U.S. reclaim the lead in the 4x100-meter relay, and afterward he got a special trophy from swimming officials that said: "To Michael Phelps, the greatest Olympic athlete of all time."