RIO DE JANEIRO - The U.S. men's 4x400-meter relay held off a late challenge by Jamaica to rebound and win gold in the event, a day after the Americans' 4x100 relay men's team was disqualified. Bahamas ...

Usain Bolt's bid to bring the curtain down on his glittering career with a 15th world gold medal remained on track as Jamaica qualified for the final of the 4x100m relay. Bolt took the unusual step of ...

Bolt did not run in Saturday's morning heats but will take his place in the evening finals after his team mates set the fastest qualifying time at Beijing's national stadium. Usain Bolt remained on ...