Nightwing (Riddle of the Beast)

This character has been a member of the Justice League of America, or the Justice League in any of its various incarnations, sworn by a duty to act as guardians of America and the world by using their skills and/or superpowers to protect Earth from the clutches of both interstellar and domestic threats.
This template will categorize articles that include it into the "Justice League of America members" category.