If the welcoming committee's anything to go by, this could be an explosive summit.<br/> <br />A 21-gun salute greeted Chinese President Xi Jinping as the BRICS leaders arrived Durban.<br/> <br />Pomp and ceremony aside, this event is more about substance, than style.<br/> <br />The first deals were struck even before the summit was officially opened - China and Brazil agreeing a currency swap worth 30 billion dollars per year for three years.<br/> <br />Changing global trade flows has long been on the BRICS agenda - but this is the first in terms of action.<br/> <br />The deal will mean almost half of the countries' trade exchanges will be taken out of the dollar zone.<br/> <br />Brazilian Central Bank governor Alexandre Tombini.<br/> <br />(SOUNDBITE) (English) BRAZILIAN CENTRAL BANK GOVERNOR ALEXANDRE TOMBINI SAYING:<br/> <br />"The idea of the swap...is to provide a back-stop line for financing of the bilateral trade even under more difficult conditions as far as the global financial markets are concerned."<br/> <br />The big
