An estimated two billion people around the world saw Jamaica's Usain Bolt thrash his rivals to win gold in the men's 100m final - but none of them were in the U.S., as NBC declined to broadcast the historic moment live. Bolt sailed through the semi-finals before successfully defending his Olympic title - against a field that included three Americans - at 4.50pm EDT. But, not for the first time this Games, NBC took the controversial decision to hold off broadcasting the hugely popular event until prime time, leaving millions of track and field fans outraged.