 As part of his revenge on Hydra for manipulating him, Punisher finds Mandarin making a speech at the United Nations and fires a special bullet.After using his rings to slow down the bullet while trying to deflect it, Mandarin is struck in the head with the bullet which is witnessed by Baron Zemo and anyone watching his speech.Helmut Zemo has a gifted intellect, with certain scientific expertise, excellent marksmanship, and extensive training in hand-to-hand combat.