When the State Department issued its long-awaited environmental-impact statement on the Keystone XL project earlier this month, one of its key findings was that if the controversial pipeline weren't built, oil-laden rail cars would pick up the slack. "Rail will likely be able to accommodate new production if new pipelines are delayed or not constructed," it argued. As Mother Jones noted recently, that rail transit is already underway. According to the Association of American Railroads (AAR), crude oil traveling by rail increased from 9,500 carloads in 2008 to an estimated 400,000 in 2013. Recently, an ExxonMobil official said the company had already begun to use trains to haul oil out of the Canadian tar sands, and the company plans to move up to 100,000 barrels of oil per day from a new terminal by 2015. In other words, tar sands will be developed one way or another, according to the State Department, with or without the $5.4 billion pipeline that would eventually link Alberta to the Gulf of Mexico.