I'd like to know, how would we know this now and not back then?
If this is true, we probably DID know it back then. But for political and diplomatic reasons, it wasn't brought to the public's attention.
I'm sure we did know it back then...one step at a time!!!
"I'd like to know, how would we know this now and not back then?"
Exactly, this doesn't make our intelligence look good. What else did they move that our intelligence does not know about?