An oil rig is seen during sunset at Lagunillas field in the eastern coast of oil-rich Lake Maracaibo, Venezuela, May 26, 2006. The Organization of Petroleum Exporting Countries (OPEC) is to assess present conditions of the global oil market in order to decide the next steps during its 141st special meeting to be held in Caracas June 1, 2006. The Energy Ministers of the member countries will discuss output quotas, prices and measures to meet the demand and ensure fair prices, according to official sources. REUTERS/Jorge Silva