Steel: A Celebration of 30 Years HardcoverInspired by Superman's selflessness, John Henry Irons used his engineering genius to reinvent himself into a champion in his own right. The perfect combination of brains and brawn, John Henry Irons was one of four different people to take up the mantle of Superman when Kal El lost his life while saving Metropolis from the monster known as Doomsday. Initially referred to by the media using Superman's nickname, "The Man of Steel," Irons simply went by