"The why—" Bill hesitated. "I haven’t been able to get any details. But something, somewhere, at some point, scared the crap out of Starfleet. Or maybe an ancestor of Starfleet. They won’t talk about it. There’s nothing on the public record. But there’s some kind of PTSD involved, I think. Like obsessively checking the locks after you’ve been broken into once. As for the who, there’s only one possibility."