Captain America is a superhero appearing in American comic books published by Marvel Comics. Captain America was a patriotic super soldier who often fought the Axis powers of World War II. The character wears a costume bearing an American flag motif, and he carries a nearly-indestructible shield that he throws as a projectile. Captain America is the alter ego of Steve Rogers, a frail young artist enhanced to the peak of human perfection by an experimental "super-soldier serum" after joining the military to aid the United States government's efforts in World War II. Near the end of the war, he was trapped in ice and survived in suspended animation until he was revived in modern times. Although Captain America often struggles to maintain his ideals as a man out of his time, he remains a highly respected figure both with the American public and in the superhero community, which includes becoming the long-time leader of the Avengers.