A 60-foot section of pipe is lowered into a trench during construction of the Gulf Coast Pipeline in Prague, Okla., in March. The Gulf Coast Pipeline, a 485-mile crude oil line, is part of the Keystone XL project and will run from Cushing, Okla. to Nederland, Texas. Although this southern stretch of the pipeline is nearly finished, the northern stretch is still under study.
Five years ago this week, a Canadian company proposed building a pipeline to send heavy crude oil from Alberta to U.S. refineries. Although the Obama administration's answer on the Keystone XL pipeline is not expected anytime soon, politicians in Washington and Canada are ramping up the pressure for the project, while environmentalists are pushing hard against it.