Captain Bruce Blackburn was a member of America's intelligence agency. He went undercover in the "Un-American Band." The public believed him dead and used a double named Jackson to foil his "comrades" in the Band. For a short time in his career, Bruce became the costumed hero known as the Destroying Demon, but soon abandoned his costume after one issue. The Destroying Demon had no powers, but he carried a rubber cable to bungee jump from building to building.