I've been reading about the NORAD agreement between Canada and the United States from a foreign policy perspective. From my personal research the historiography of NORAD in terms of foreign policy seems to focus on Canada a lot since there was a lot of domestic debate and controversy (sovereignty, Canadian identity).
I want to read about the American perspective, however I don't seem to be able to find many books/articles about it.
Who were the important actors in America for reaching the NORAD agreement? What are significant events (agreements, treaties, speeches etc.) that explicitly pushed the US towards NORAD. From my understanding, some sort of joint defence was necessary in response to the threat of Soviet bombers. However, I'm just missing all the decision-making process that led to it.
Let me point you in the direction of NORAD's FOIA release page. A while back, I was talking to the FOIA officer in charge of NORAD's historical studies, and she said they'd be putting those online, and it appears she followed up. They're a wealth of information and go into some depth about what the internal thought process was.