The 15th BRICS Summit has kicked off in Johannesburg, South Africa, amidst geopolitical uncertainties and increasing pressure on the global economy. The five country grouping of Brazil, Russia, India, China and South Africa has emerged as a robust and comprehensive group, with dozens more nations looking to join. What is topping the agenda of this year's summit? How do BRICS countries feel about potential expansion? What challenges does the group face, and how are they cooperating to meet those challenges?