Suriname's President Desi Bouterse (L) and Venezuela's President Nicolas Maduro (R) attend the handover ceremony of the Secretary General of the Union of South American Nations (UNASUR) in Caracas September 11, 2014. Former Colombian president Ernesto Samper was formalised as the new Secretary General of UNASUR, taking over from Venezuelan Ali Rodriguez. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: POLITICS)