53 senators urge approval of Keystone XL pipeline - Article Photos 4/4

Sen. John Hoeven, R-N.D, walks toward a illustration of the Keystone Pipeline and proposed expansions, after a news conference on Capitol Hill in Washington, Wednesday, Jan. 23, 2013. A key approval of a revised route for the Keystone XL oil pipeline from Canada to the U.S. Gulf Coast puts the long-delayed project back in the hands of the U.S. government. (AP Photo/Jacquelyn Martin)