Captain America

Captain America is a fictional character, a superhero who appears in comic books published by Marvel Comics. 
Captain America has been the alter ego of Steve Rogers, a frail young man who was enhanced to the peak of human perfection by an experimental serum in order to aid the United States' war effort. Captain America wears a costume that bears an American flag motif, and is armed with an indestructible shield that can be thrown as a weapon.