Sgt. Rob Jones looked down his body, past the hospital gown, his eyes resting on the stumps where his legs should have been. The marine engineer lay in a hospital bed at Walter Reed, a few days after he stepped on an IED in Helmand, Afghanistan, and doctors had just performed a double amputation. Jones' first response was not self-pity or doubt. His mind rested on the one thing he had found most difficult before his injury. Rowing. He would become a rower. "I'm the type of person that likes to challenge myself and I like to do the hardest thing possible," Jones told ABC News. "Facing challenges and overcoming challenges is what makes you grow as a person."

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