Burst oil pipeline causes 'catastrophe' in Alaska

A burst pipeline in Alaska's North Slope has caused the Arctic region's worst oil spill, spreading more than 250,000 gallons of crude oil over an area used by caribou herds and prompting environmentalists again to question the Bush administration's drive for more oil exploration there. The leak was first spotted by a British Petroleum worker 11 days ago, and was reported to have been plugged a few days later. Initial hopes expressed by BP that the spill was limited to a few tens of thousands of gallons proved to be over-optimistic. Alaska's Department of Environmental Conservation has steadily increased its estimate of the size of the spill, the latest estimate putting it at around 265,000 gallons. The leak, whose cause is unknown, occurred in a remote part of the most sparsely populated state in the United States, and it remains to be seen what damage, if any, it has done to ecosystems. It does, however, give grist to groups who have challenged Washington's assertion that oil can be prospected and shipped while leaving only the gentlest of "footprints" on the landscape....