It is just four months since former Marine sergeant John Peck received a double arm transplant. But he is already showing incredible progress. Peck lost all four limbs after standing on a homemade bomb in Afghanistan in 2010. Now, the 31-year-old has reached a milestone he never thought possible: he has two fully functioning arms - and is gaining control of his right elbow. In a video posted to his Facebook page on Tuesday, Peck shared a short exercise with his physiotherapist, sliding a block forwards and backwards across a table. For most, it would be simple. For John, it marks a moment of triumph. He beams at the camera as his physiotherapist straps the wheeled block onto his arm. Viewers then watch as Peck visibly strains to push it away from him, and back to his chest, over and over again. Finally, after reaching his total, he says, 'cool!'
'Cool!': Former Marine exclaims with joy in video showing his incredible progress just 4 months after receiving double arm transplant
