Found in 2 comments on Hacker News
crocwrestler · 2022-04-29 · Original thread
Well, they did have domestic terrorist groups going around setting off bombs on the regular in the 60s and 70s. I was quite surprised to read about it.

schoen · 2017-08-06 · Original thread
There is also this kind of amazing book

about the time in the early 1970s "when bombings by domestic underground groups were a daily occurrence".

Fresh book recommendations delivered straight to your inbox every Thursday.