Stark is a brilliant engineer and suave billionaire, as well as CEO of Stark Industries, originally created by his father Howard Stark. After being captured by the terrorist organization Ten Rings, he created a powerful generator embedded in his chest called an Arc Reactor to keep him alive, as well as constructed the first prototype Iron Man armor. After his return to the U.S. he reconstructed the armor, and using the power generated from the Arc Reactor donned the pseudonym of Iron Man. He is one of the founding members and advisers of the Avengers team. He had surgery to have the shrapnel removed and no longer needs the Arc Reactor, starting over with himself.