I am about a third through the first book and I have not found out or figured it out yet...how did they sabotage the nuclear test, and how did they get away with it?
IIRC the Trinity test was of the Fat Man design (like the Nagasaki bomb). The Thin Boy (Hiroshima) design was so "assured" that the bomb was dropped untested, but maybe they will not do that ITTL (in this timeline). Yeah, I know you veterans are laughing at my speculations, since you know what is going to happen, so I'll just read and find out.