'Because Usain told me, 'you've got to win, you've got to do your best or you can't go home' IMAGE: Yohan Blake of Jamaica, Trae Williams of Australia and Adam Gemili of England......
Usain Bolt of Jamaica won his second straight Olympic gold medal in the men's 100 metres on Sunday, crossing the line in an Olympic record 9.63 seconds. Bolt joined Carl Lewis as only the second......