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Guy Pearce's Aldrich Killian is the head of A.I.M.
Advanced Idea Mechanics - a brain-trust organization that originated in the comics - was previously confirmed to be an element of the threequel, though how it fit into the plot wasn't clear until now. As explained by Feige, A.I.M. is responsible for manufacturing the dreaded Extremis virus - a project overseen by scientist Aldrich Killian (Guy Pearce):
"Killian heads a brain-trust organization called AIM that is developing Extremis, which is something that taps into human DNA and is able to reprogram it and regenerate limbs and enhance strength and cure wounds. But it also could change the whole world, which is what Killian intends to do with it."