Admin note: This thread is an offshoot of the Missing EgyptAir MS804 Aircraft thread, as per Fred's request.
The people assigned to monitor radio waves at Pearl Harbor knew the Japanese carrier group was coming in as well, I actually talked to a very elderly lady in a nursing home a few years ago who was a WAVE assigned to just that task there in that time. I don't know how the lid is kept on so tightly with this stuff, but it most certainly is.
When that little tidbit came out during one of our many conversations one day, I couldn't help but dig in just a *little* bit, but not too much. Hell how could I not, she was there! I very casually asked her if she thought there was any chance that Roosevelt could have had pre knowledge of what was on the way. I'll never forget watching those ancient eyes wander back through the mists of time, for maybe 30 seconds or so. She finally took a deep breath and said "well, he must have known, I knew".