FILE - In this Dec. 20, 2007 file photo, workers leave their shift as Cubans prepare to inaugurate the Camilo Cienfuegos refinery ahead the IV Petrocaribe Summit in Cienfuegos, Cuba. Fears that falling oil prices could knock the wheels off the already wobbly economy of oil-dependent Venezuela have sparked apparent interest in alternatives to Petrocaribe, a trade program created by the late President Hugo Chavez that has kept the region dependent on the South American country for energy. All the countries of the region, except Cuba, are expected to participate in closed talks that will involve U.S. Vice President Joe Biden and other U.S. officials as well as representatives of the European Union, the U.N., and multi-lateral financing agencies such as the World Bank and Inter-American Development Bank. (AP Photo/Dado Galdieri, File)