U.S. Sen. Mark Kirk, right, emerges from the 103rd floor stairwell at Chicago's Willis Tower, Sunday, Nov. 4, 2012, during the RIC SkyRise Chicago event, a fundraiser for the Rehabilita

 

              U.S. Sen. Mark Kirk, right, emerges from the 103rd floor stairwell at Chicago
U.S. Sen. Mark Kirk, right, emerges from the 103rd floor stairwell at Chicago's Willis Tower, Sunday, Nov. 4, 2012, during the RIC SkyRise Chicago event, a fundraiser for the Rehabilitation Institute of Chicago, where Kirk is a patient. On the left is Joanne Smith, M.D., President and CEO of the Rehabilitation Institute of Chicago. Behind Kirk is Michael Klonowski, a physical therapist who is assisting Kirk with his recovery from a stroke. (AP Photo/Teresa Crawford)