You rprediction about who would do it first was wrong, but your prediction about who is going to call on our bonds...well, it looks like that one is going to be proved right
China will call on her treasury bonds as soon as she can
and we will pay it with what?
I thought China had spent a bunch of our debt buying up natural resources around the world (oil, mineral rights, etc.). I know they are still holding a substantial amount of US debt, but how much is that, now?