The ones to watch: medal hopefuls for London

Surprise, surprise. Any talk of the Olympics has to start with the flashy Jamaican sprinter. His performance in Beijing four years ago was magical — gold medals and world records in the 100 meters, 200 meters and sprint relay. Sure, Bolt hasn't been as supernatural the past couple of years, but expect him to peak just in time for the big show in London. There's no reason he can't win another three golds, though world records may be too much to ask. His toughest competition in the 100 and 200 is likely to come from countryman Yohan Blake.