Vice President Joe Biden watches at left as Sen. Mark Kirk, R-Ill., 

Vice President Joe Biden watches at left as Sen. Mark Kirk, R-Ill., second from left, accompanied by Sen. Joe Manchin, D-W.Va., second form right, and Senate Majority whip Richard Durbin of Ill., right, walks the steps to the Senate door of the Capitol building on Capitol Hill in Washington, Thursday, Jan. 3, 2013. Kirk said he often visualized climbing the 45 steps of the U.S. Capitol as a source of inspiration during his months of grueling physical therapy after suffering a major stroke last year.     (AP Photo/ Evan Vucci)
Associated Press
Vice President Joe Biden watches at left as Sen. Mark Kirk, R-Ill., second from left, accompanied by Sen. Joe Manchin, D-W.Va., second form right, and Senate Majority whip Richard Durbin of Ill., right, walks the steps to the Senate door of the Capitol building on Capitol Hill in Washington, Thursday, Jan. 3, 2013. Kirk said he often visualized climbing the 45 steps of the U.S. Capitol as a source of inspiration during his months of grueling physical therapy after suffering a major stroke last year. (AP Photo/ Evan Vucci)
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