done everything he wanted to do, and that he says is a good way to go out. >> knowing when to say good-bye is a skill. don't pull a michael jordan. jamaican usain bolt, he did it again, he won his second consecutive olympic gold in the 100 meter. he ran it in 9.63 seconds. that is the second-fastest 100 in history. that man can run. bolt, he is aptly named. >> another gold on the track from team usa. sanya richards-ross ran her way to gold in the 400 meter. and her teammates dee dee trotter got the bronze. >> a much-needed triumph also for great britain's andy murray. of course, you may remember last month he lost wimbledon to roger federer. but yesterday, oh, yeah. he got his revenge in three straight sets. he beat federer and won a gold medal for great britain. oh, that's a great moment for him. >> and nadal, my favorite from spain, he wasn't in it. injured.