London, Aug 12: Olympic bronze medallist Emma Coburn of the United States cut nearly four seconds off the championships record en route to winning the women’s 3,000 meters steeplechase. The 26-year-old Coburn waited patiently behind world record holder Ruth Jebet of Bahrain and three Kenyan athletes, including defending champion Hyvin Kiyeng Jepkemoi, for most of the race, before charging for the lead together with her teammate Courtney Frerichs in the fil lap.