MANAGUA, Nicaragua (AFP) – Nicaraguan firefighters on Friday were trying to bring under control a huge fire at their country’s only oil refinery that has been burning for two days, creating health fears over noxious smoke. The blaze started Wednesday when one of four big fuel tanks exploded at the Puma Energy facility in the Pacific port of Puerto Sandino, some 70 kilometers (40 miles) northwest of the capital Managua. A second tank ignited on Thursday […]