Ok.. where to begin... sorry in advance I'm going off memory here at work but:
Anyway, my main question is who kills Nora? The thug working for the vice president? Did I miss something about him, is he supposed to be anonymous beyond the fact that he has a bionic arm (and in the present, two bionic arms)? I'm pretty sure the main convo between Peacekeeper and Nora is about her not quite ready to accept what Harley says about the future as being true, while PK is already convinced. She does the math herself and comes around, but why did she get killed? And what does it have to do with Peacekeeper going through with his public assassination of Harley?
[/SPOILER]
I assume I'm missing a bunch, but am I way off on the Nora stuff? It seems like it should be important because it's the main thrust of The Question's investigation, but by the end it seems like The Question is missing the forest for the trees anyway. I guess it's important in that it's how the reader figures out what's happening, but something about it seems odd to me.