Tribesmen have blown up a major oil pipeline in southern Yemen. Officials say the flow of crude has been halted due to the explosion in Ash-Shihr town of Hadramawt province. This is the second such attack in the past three days. On Thursday, the country\\\'s main oil pipeline was bombed in the central province of Ma\\\'arib. Over the past two years, oil and gas pipelines in Yemen have come under repeated attacks, causing fuel shortages and slashing export earnings in the impoverished country. Yemen depends on oil exports for some 70 percent of government spending. Show Less >>