 It began as a form of music chanted at wakes to comfort mourners -- now it is part of Cameroons cultural mainstream, and a powerful form of expression for its frustrated youth.Mbole pronounced em-bo-lay developed around a quarter of a century ago in poor districts of Yaounde, the central African nations capital.It began as a sort of back-and-forth at funeral vigils between a chanter, who would devise lyrics and sing them, and responders, who sang the lyrics back and provided rhythm using... 