Steve Rogers participated in an experiment that turned him into a Super Soldier. As Captain America, he now has the responsibility of saving everyone from unimaginable threats. He was the first Avenger to be enrolled under the Avenger Initiative.
Since then, he has been teaming up with other superheroes to fight with enemies that threaten to destroy all that they believe in. If you love the man with the Vibranium Shield, get this official Captain America Rubber Keychain