#U.S. Agent (Marvel Comics)

John F. Walker is a Marvel Comics character known as U.S. Agent, a patriotic figure who gained superhuman strength through the Power Broker's experiments. He initially appeared as Super-Patriot and briefly served as Captain America before adopting the U.S. Agent identity. Often portrayed as a more aggressive and uncompromising counterpart to Captain America, he is a super-soldier dedicated to protecting his country.