Originally Posted by xyzzy
There is a train behind security that will take you between these two terminals. Check out
this map for more info. Of course, this depends on which part of terminal A you'll be in and I have no idea where exactly AA is there.
Actually, the monorail does not go to Terminal A. And, the underground train (using the word train VERY loosely) requires passing through security at each terminal. I don't know the bus deal. It looks as though it stays behind security, but I've never tried it.