TOKYO :Botswana’s 21-year-old Busang Collen Kebinatshipi won gold in the world 400 metres on Thursday, roaring clear in 43.53 seconds, with compatriot Bayapo Ndori taking bronze on a memorable night for the African nation. Kebinatshipi, who scorched a season-leading 43.61 in the semi-finals on Tuesday, ran a brilliantly judged race as others went out hard, and came off the final bend strongly, driving through the rain for a dominant victory. Jareem Richards of Trinidad and Tobago took silver in