I have just watched this interview which someone shared with me on another group. Keyhoe mentions a small group within the airforce as well as a number of documents. Is he talking about Majestic 12 almost twenty years before the controversial MJ12 documents surfaced? Donald Menzel was also mentioned. He was a member of MJ12. Enjoy the interview.
https://youtu.be/zxpoGMgrYdY