Steven Rogers, known as Captain America, is a superhero from Marvel Comics. He was originally a frail young man who, during World War II, volunteered for an experimental program that transformed him into a super-soldier. Known for his unwavering principles and leadership skills, Captain America carries a shield made of vibranium, which he uses both defensively and offensively. In the Marvel Cinematic Universe, he plays a crucial role in leading the Avengers and combating threats to global security. His character symbolizes patriotism, courage, and sacrifice.