FILE - In this Thursday, Oct. 4, 2012 file photo, U.S. Marine Cpl. Daniel Riley, 21, navigates the steps outside his apartment on his prosthetic legs in San Diego, Calif. Riley lost both legs to an ... more 
FILE - In this Thursday, Oct. 4, 2012 file photo, U.S. Marine Cpl. Daniel Riley, 21, navigates the steps outside his apartment on his prosthetic legs in San Diego, Calif. Riley lost both legs to an IED in Afhganistan. Learning to walk on his prosthetic legs was "like kicking a soccer ball in a swimming pool." Nearly 2,000 American troops have lost a leg, arm, foot or hand in Iraq or Afghanistan, and their sacrifices have led to advances in the immediate and long-term care of survivors, as well in the quality of prosthetics that are now so good that surgeons often chose them over trying to save a badly mangled leg. (AP Photo/Lenny Ignelzi) less 
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Associated Press | Photo By Lenny Ignelzi
Wed, Apr 17, 2013 8:03 PM EDT