Steve knows that look. Knows the pain that Runa must feel every time he gets that vacant far away expression. He knows all too well the sorts of demons that can haunt the mind for long after a danger has passed. Every soldier does, some more than others.

"Of course I'll go. As soon as you'll let me even." He's sat by Bucky's side through horrendous night terrors and panic attacks, held Barton over the toilet when he was so weak from lack of sleep and dehydration he couldn't hold himself up to be sick. Steve knows trauma. And he knows that all too often there's nothing to fix. You just have to wait it out. He doesn't want to see Viatorus like that too, but it isn't about want. He's needed there at his friend's side.

"What else is there to explain?"