GUAM is important to us, but if the chinks want to attack and take it there's nothing we can do to stop it even with more defenses. CHARLIE.

Taking it and attacking to damage its facilities are two different things.
If they were going literally take it, the U.S. would know way in advance, and I would say there is no way that is possible as our (Including Australia) Air Force is far, far more advanced than theirs; Ditto to an even larger degree our Navy, and Australia is getting new ultra modern submarines.