U.S. Senator Mark Kirk (R-IL), center, who participated in a clinical walking trial at the Rehabilitation Institute of Chicago following a massive stroke in January 2012, accompanied by U.S. Vice ... more 
U.S. Senator Mark Kirk (R-IL), center, who participated in a clinical walking trial at the Rehabilitation Institute of Chicago following a massive stroke in January 2012, accompanied by U.S. Vice President Joe Biden, right, and Senator Joe Manchin (D-WV), left, walks up the Capitol steps in Washington on Thursday, January 3, 2013. Kirk hopes his recovery will serve as an inspiration to the millions of Americans recovering from stroke. (Paul Morigi / AP Images for Rehabilitation Institute of Chicago) less 
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Associated Press
Thu, Jan 3, 2013 5:02 PM EST