

Some of about 500 miles' worth of coated steel pipe made by Welspun Pipes Inc., originally for the Keystone oil pipeline, is stored in Little Rock, Ark., May 24, 2012. Danny Johnston/AP
Environmental activists opposed to the Keystone XL tar sands pipeline project protest outside the White House in Washington, Feb. 13, 2013. US Secretary of State John Kerry said he hopes his department will make a decision in the near term on the pipeline, which would transport 830,000 barrels of oil per day from Canada's oil sands fields to refineries and ports in Texas and which has had its permit pending for 4-1/2 years. Jonathan Ernst /Reuters
A US Park Police officer motions journalists away from environmental activists gathered outside the White House in Washington, Aug. 22, 2011, during a civil disobedience campaign against a proposed oil pipeline from Canada to the US Gulf Coast. The protesters want President Obama to deny a permit for an extension of the pipeline, which would carry oil extracted from tar sands in Alberta, Canada, to refineries in Texas, 1,700 miles away. J. Scott Applewhite/AP
Actress Daryl Hannah smiles as she and other environmental activists opposed to the Keystone XL tar sands pipeline project protest outside White House in Washington, Feb. 13, 2013. Jonathan Ernst/Reuters
Demonstrators calling for the cancellation of the Keystone XL pipeline carry a giant mock pipeline during a rally in front of the White House in Washington, D.C., Nov. 6, 2011. Joshua Roberts/Reuters
Sen. John Cornyn (R) of Texas points to his lapel pin as he speaks about the Keystone XL pipeline during a news conference on Capitol Hill in Washington, March 22, 2012. Charles Dharapak/AP
A truck travels along Highway 14 on April 19, 2012, several miles north of Neligh, Neb., near the proposed new route for the Keystone XL pipeline. The Canadian company trying to build the disputed Keystone XL pipeline submitted a new application for the project after changing the route to avoid environmentally sensitive parts of Nebraska. Nati Harnik/AP
Taz Bouchier, an elder with the Idle No More movement, hugs a supporter after her speech at a rally in solidarity with the Washington, D.C., protest against the Keystone XL pipeline and for environmental action in Edmonton, Canada, Feb. 17, 2013. The TransCanada Corp. pipeline would link the oil sands of northern Alberta, the world's third largest crude resource, to refineries and ports in Texas. Dan Riedlhuber/Reuters
Michael Bishop poses Dec. 11, 2012, with a pair of flags flying in protest of the planned Keystone XL pipeline, near the entrance to his property south of Douglass, Texas, which is directly in the path of the project. Bishop says that TransCanada lied to Texans when it said it would be using the Keystone XL pipeline to transport crude oil. Andrew D. Brosig/The Daily Sentinel/AP
Crew work on construction of the TransCanada Keystone XL Pipeline near County Road 363 and County Road 357, east of Winona, Texas, Dec. 3, 2012. Sarah A. Miller/The Tyler Morning Telegraph/AP