Obviously, I don't have Erskine's notes or his formula.

[ And thank fuck for that. It's good that Steve's in the world, but Tony doesn't believe that any others like him should ever be created. Not everyone is as good as Steve. ]

But I have my father's and I read over them after Fury told me we were going to be working together. It heals him. I know that. I fought with him. And it, you know, kept him alive in ice for seventy years.