BEIJING (AP) - Usain Bolt, gold medal winner of the 100m and 200m events in Beijing, has helped Jamaica win the 400-meter relay in world-record time.
The Jamaicans shaved 3/10ths of a second off the previous record, finishing in 37.10 seconds.
Bolt ran the third leg of the relay before handing off to former 100m world record-holder Asafa Powell. The Jamaican quartet, which also included Nesta Carter and Michael Frater, eclipsed the old 400 relay mark of 37.40 originally set by the United States at the Barcelona Olympics in 1992.
The Jamaicans were nearly a full second faster than silver medalists Trinidad and Tobago, which finished in 38.06 seconds.
Japan won the bronze in 38.15 seconds.
The United States failed to reach the men's 400 relay final when the baton was dropped during yesterday's qualifying round.