Steve frowned, but it wasn't like he could really argue against that. He didn't understand what was going on no matter how much he stared at the scene in front of him. To be honest, he probably wouldn't have enough confidence to fix Bucky's arm even after watching Tony do all this. He wasn't an engineer or mechanic and he didn't want to cause his friend any pain.

However, he didn't want to just follow what Tony ordered them to do.

"Thought you'd enjoy the attention."