At first, Steve had been sorely disappointed by Stark's son. Howard had been innovative, brave, and a good friend-someone who could make Steve smile at his dry wit and fantastic ideas, even in a blackout. Tony was selfish and manipulative, allowing people to believe that he fought for the benefit of others, when really he only flew around in the suit to promote himself.

But looking back on that day in Manhattan, on Tony's complete lack of surprise when Banner came puttering up on that scooter, Steve sees a heart he is familiar with, reflected through an arc reactor.