This month, the U.S. Court of Appeals for the Tenth Circuit ruled not to grant the Sierra Club, Clean Energy Future Oklahoma, and the East Texas Sub Regional Planning Commission a temporary injunction to stop the construction of the Gulf Coast pipeline, the southern extension of Transcanada's Keystone XL tar sands export pipeline. In October 2011, the Sierra Club, Clean Energy Future of Oklahoma, and the East Texas Sub Regional Planning Commission sued the Army Corps of Engineers for approving construction of the pipeline, which is to run from Cushing, OK, to the Gulf Coast. According to multiple sources, the expansion of the southern leg of the Keystone XL is set to begin on November 1, 2013.

Sources: TransCanada, Reuters, U.S. Court of Appeals for the Tenth Circuit, Biological Diversity Organization