KENYA'S marathon world record holder Kelvin Kiptum and his coach were killed in a traffic accident in the Rift Valley, cutting short the career of the only man to have run the endurance classic in less than two hours and one minute. The 24-year-old set the world record, tab at the Chicago Marathon in October with a time of two hours and 35 seconds to surpass the mark of 2:01:09 run by compatriot Eliud Kipchoge in Berlin in 2022. Kiptum, who clocked three of the seven fastest marathon times in history, had been hoping to become the first man to run the…