Hospital Corpsman Sharod Edwards, who lost his arm in Iraq in 2005, is the first person in the world to have this incredible new arm.
"This is the next step of what the progress is as far as technology in this field... I'm very happy to be a part of it," [said prosthetist Geoffrey Hemmen].
Edwards said having two hands again has given him much of his life back.
"I wanted to fight the whole thing of being amputated," he said of his injury. However, he said a friend who has spent his whole life in a wheelchair -- and who has won two gold medals -- has inspired him to keep going.
He also offers a message for others in similar situations.
"Don't let that injury count you out. There is help out there."
Another video at the link shows how the arm works.