Left-wing guerrillas have bombed Colombia’s Cano Limon-Covenas oil pipeline and halted its crude pumping operations in an attack just a days before presidential elections, the army said on Friday. The pipeline, the country’s second most important, transports crude oil from Cano Limon fields operated by U.S. company Occidental Petroleum in Arauca province on the Venezuelan border to Covenas port on the Caribbean coast. Full Story