To replace right-arm Pepper Potts (Gwyneth Paltrow) promoted to run company, Tony hires on the left arm, Natalie Rushman aka Natasha Romanoff (Scarlett Johansson). (Spoiler: Natalie is undercover for Nick Fury (Samuel L. Jackson) of the Avengers). As his 30th birthday approaches, Tony's blood tests deteriorate, poison from the suit power core beside his heart. ~"If this were your last birthday party, how would you celebrate?" ~"I'd do whatever I wanted with whoever I wanted."
Justin Hammer (Sam Rockwell), U.S. government military weapons contractor, plays man of the people devil's advocate, "I'd love to leave my door unlocked when I leave the house, but this ain't Canada." Best pal Colonel Rhodes (Don Cheadle) testifies, reluctantly obeying bleeping Senator Stern (Gary Shandling), reading out of context, that the suit is a weapon better under official control.