(L-R) Venezuela's President Hugo Chavez, Argentina's President Nestor Kirchner, Ecuador's President Rafael Correa, Brazil's President Luiz Inacio Lula da Silva, Paraguay's President Nicanor Duarte and Bolivia's President Evo Morales gather after a private meeting at the Energy Summit in Isla Margarita April 16, 2007. South American leaders gathered on Monday to discuss energy integration projects at a summit hosted by Hugo Chavez in Isla Margarita. REUTERS/Miraflores Palace/Handout (VENEZUELA)