What defines a mercenary today?

Can Mali's military junta maintain its hold on power despite a jihadist blockade?   What role are mercenaries playing in Africa's  current conflicts.   And the genesis of a new type of Algerian rai protest music known as "Way Way"     Presenter: Audrey Brown Producers: Yvette Twagiramariya, Patricia Whitehorne, Bella Hassan and Mark Wilberforce in London with, Madina Maishanu in Abuja. Technical Producer: Jack Graysmark Senior Producer: Paul Bakibinga Editor: Andre Lombard and Alice Muthengi