Iron Man 3 stars Robert Downey Jr. as Tony Stark/Iron Man. It begins with a flashback to 1999 where Stark refuses an offer from Aldrich Killian, humiliating him. In the present, terrorist attacks are occurring in the US perpetrated by a group called the Mandarin. Stark's investigation leads him to Tennessee where he meets a boy named Harley who helps him discover the attacks are actually experiments with a drug called Extremis. Stark realizes Killian is behind everything seeking revenge for 1999. Killian kidnaps the President and destroys Air Force One. Stark stops Killian's plans and saves Pepper Potts, emphasizing he will always be Iron Man despite removing shrapnel from his heart.