Answer
Yellowjacket, the armored Avenger co-created by Roy Thomas, made his first appearance in "Tales to Astonish" #44 (June 1963). He is a biochemist who developed a powerful exo-suit with the ability to fly, shoot energy blasts, and control insects. Yellowjacket has been a member of the Avengers, the Defenders, and S.H.I.E.L.D.