If he was in telecomm ratings he dealt with processing message traffic all the time and would have access.
Ok, you'll have to explain that one to me.
Maybe in 1944, you needed a telecomm geek to transcribe the coded messages, or de-code them to another bit of paper that get's passed up the line. But that's not the situation today. There's no excuse for the telecomm guy to see the plain text, it could be encoded right through to the need-to-know guys.
Why in the world would an Army PFC need to be able to read a State Department cable sent from an Embassy straight to the State Department? And if it wasn't sent straight through, why not?