It sounds ridiculous, but this is a time for ridiculous measures like a 3.6 trillion budget with a 1.8 trillion deficit that obama proposed.
Basically, our treasury notes may be worthless and the chinese may want to dump them if not for some guarantee.
Dumping the notes by the chinese would cause a worldwide run on the dollar effectively “bombing the world back to the stone age”.
If it comes to war, they wouldn't need the bomb, they could just drop people on us.