[He let out a long sigh and made himself sit back, though he still wasn't looking at Steve properly. It was all things Steve should know, would have to know, but Tony still doesn't really want to talk about it. Were they really that easily manipulated, or had it all just settled into cracks that were already there? Was it inevitable that they'd just come apart?

Tony would probably never know. It didn't stop him worrying over everything in endless circles when he wasn't otherwise occupied enough.]

His name was Zemo. Sokovian, I guess. Got it into his head that if we tore each other apart, it would have more of an impact than if someone else tried. [Another shrug.] Worked, too.