"No... no, they don't." It's why John leaves science alone, himself. He scoots a little closer to Tony, lowering his voice a little more. They're alone, at least, presumably, but he's about to ask the man something he knows is personal, even without the details. "I know you may not want to tell me what happened, but I need to know how large an impact the thing you wish to reverse has. How many people did it affect?"