Jamaica stunned the United States in the last women's track race of the world championships in Beijing today as Novlene Williams-Mills snatched the 4×400 metres relay gold bypassing Francena McCorory in the final 10 metres of a thrilling race. Kenya's Asbel Kiprop won the world title of 1,500 metres for the third time today, to take the gold. The 26 yeasr old, strode majestically to the finish and clocked 3 minutes 34.40 seconds, running the final lap in 51 seconds. Kiprop won Kenya's seventh gold medal of this world championships.Ethiopia's Mare Dibaba won the women's marathon at the world athletics championships after a thrilling sprint finish in Beijing today. The 25-year-old Dibaba out-kicked Kenya's Helah Kiprop to win the gruelling event by just one second, crossing the finish line in two hours, 27 minutes and 35 seconds.Ethiopia has a long and proud tradition in marathon running but Dibaba was the first Ethiopian female to win the lung-sapping event at the world championships.