Found an interesting topic over at aafo.com, and thought to pass it on.
http://www.roadrunnersinternationale.com/transporting_the_a-12.html
http://www.roadrunnersinternationale.com/transporting_the_a-12.html
Fascinating! It's a miracle these photos survived and aren't classified and in a vault! Amazing that the YF-12 was built alongside and not allowed to be viewed by those building the A-12!Interesting read!
Thanks for the post.