A-12 ARCHANGEL CIA PROJECT OXCART
That is a great read!
Also, there is a full book on the same subject, available on pdf.
ARCHANGEL: CIAs SUPERSONIC A-12 RECONNAISSANCE AIRCRAFT
DAVID ROBARGE CIA CHIEF HISTORIAN
https://www.cia.gov/library/center-for-the-study-of-intelligence/csi-publications/books-and-monographs/a-12/Archangel-2ndEdition-2Feb12.pdf
Cool!