Sen. John Thune, R-S.D., right, speaks about the Keystone XL pipeline during a news conference on Capitol Hill in Washington, Thursday, March 22, 2012. From left re: Sen. Richard Lugar, R-Ind.; Sen. ... more 
Sen. John Thune, R-S.D., right, speaks about the Keystone XL pipeline during a news conference on Capitol Hill in Washington, Thursday, March 22, 2012. From left re: Sen. Richard Lugar, R-Ind.; Sen. John Cornyn, R-Texas (obscured); Sen. John Hoeven, R-N.D.; Sen. David Vitter, R-La.; Rep. Lee Terry, R-Neb.; and Rep. Roy Blunt, R-Mo. (AP Photo/Charles Dharapak) less 
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Associated Press | Photo By Charles Dharapak
Fri, Mar 23, 2012 4:02 AM EDT