Leaders of the BRICS group of nations are discussing the possible expansion of the five-nation bloc. The Brics countries - Brazil, Russia, India, China and South Africa who are currently meeting at the 15th BRICS Summit in Sandton, Johannesburg have also initiated talks to create their own currency, economic and trade systems within the bloc. For more on this, Elvis Presslin spoke to Professor Chris Landsberg, Director of the Centre for African Diplomacy and Leadership at the University of Johannesburg