This book is a 2020 revised version of the 2017 issue. There have been updates, new photos and other material included.Ever wonder why when you go to Museums to see an A-12 or an SR-71 how they got in either that great condition orterrible condition? This directive was requested by the Roadrunners Internationale Organization. They are the group that is responsible for flying and maintaining the Lockheed A-12/ OXCART program and SENIOR CROWN. Lockheed...