Jacob Kiplimo and Beatrice Chebet of Kenya successfully defended their world cross country titles in Belgrade on Saturday. It's just the fifth time in history that both the senior men and women's champions have retained their titles at the championships -- the first since Ethiopian duo Kenenisa Bekele and Tirunesh Dibaba did in (2005/06) Kiplimilliono made it three successive world crowns for Uganda -- Joshua Cheptegei winning the