John Walker, AKA U.S. Agent, is a former soldier and Captain America. He's temperamental, impulsive, arrogant, protective, and depressed. He was stripped of his Captain America title after killing a terrorist with his shield, and his wife divorced him for neglecting their relationship and their son after the incident. He hates having the subject brought up. Despite all his flaws, he's still a morally decent man. He has short blond hair and blue eyes. He's currently a member of the New Avengers.