Tree, Turn them lose, and watch how fast they'll start drilling! Obama has refused to open fedral lands to new drilling for years now! The oil is going to be produced, sold, and used, no matter what. So why not the U.S. the ones on the recieving end for a change? And if that should impact Putin's economy, so much the better! The oil from the Canadian tar sands that would be transported through the Keystone pipeline, is now being loaded on trains, and trucks, and shiped to U.S. refineries throughout the gulf States. The tanker cars, and tucks from Canada, and the North Dakota, are comming down by the hundreds everyday! The carbin footprint by those trains, and trucks, are far worse to the enviorment than zero through a pipeline, and the chances of an accident, much less!