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Associated Press
Double amputee Jason Koger, 34, of Owensboro, Ky., accompanied by prosthetist for Advanced Arm Dynamics, Ryan Spill, demonstrates his i-limb ultra revolution prosthetic hands during an interview with the Associated Press, Thursday, May 2, 2013, in Philadelphia. Koger, a husband and father of three who lost his limbs in an accident, can now activate with an iPhone app 24 different grip patterns for his new hands. (AP Photo/Matt Rourke)

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