Captain America wears a costume that bears an American flag motif, and is armed with a nearly indestructible shield that he throws at foes. , a frail young man enhanced to the peak of human perfection by an experimental serum to aid the United States government's imminent 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 the present day to subsequently become the long-time leader of the Avengers