JOHANNESBURG( Reuters)-Nkateko Muyimane and six fellow African students hid in a subway while Russian shells pounded Kharkiv, before fleeing on a train to Budapest they very nearly failed to board.... Ukraine's history of attracting Africans to its academies dates back to the Cold War, when Soviet states wooed students from newly independent African nations with the promise of a subsidised education.... Her mother booked her three tickets; all got cancelled....