T&T Sprinter Jereem Richards set a national record in the finals of the men's 400 meters at the Olympics but fell just outside medal contention as he finished 4th.br br American Quincy Hall won his maiden Olympic title with a brilliant personal best of 43.40, the fourth fastest time in history.br br And this country's most promising Olympic medal hopeful, Nicholas Paul, failed to advance in the men's sprint quarter-finals.