Final results1. Carter, Frater, Blake, Bolt, Bailey-cole  Jamaica     2. Kimmons, Gatlin, Gay, Bailey, Demps, Patton  Team USA     3. Bledman, Burns, Callender, Thompson  Trinidad and TobagoLONDON - Jamaica’s 4x100m relay team broke the world record as Usain Bolt won his third gold medal of the London Olympics, taking them home in 36.84.It was the same Jamaican quartet of Nesta Carter, Michael Frater, Yohan Blake and Bolt that set the previous mark of 37.04 at the world championships in Daegu last year.The United States team of Trell Kimmons, individual bronze medallist Justin Gatlin, Tyson Gay and Ryan Bailey won silver in 37.04 to equal the old record.Canada finished third but were disqualified, leaving the athletes in tears on the track as Trinidad and Tobago were awarded the bronze.Agencies