Miles of pipe ready to become part of the Keystone pipeline are stacked in a field near Cushing, Okla., in 2012.
Miles of pipe ready to become part of the Keystone pipeline are stacked in a field near Cushing, Okla., in 2012. Associated Press File photo
Miles of pipe ready to become part of the Keystone pipeline are stacked in a field near Cushing, Okla., in 2012. Associated Press File photo