[irishcoffee]

Sincerely, correct me if I am wrong:

This message I am about to post may travel through China before arriving at its destination, which may or not be back in the US.

If this message goes from Point A (US) to Point B (China) to Point C (US) it is not purely domestic traffic.

At Point C, where it enters the US, it should be possible to see that it came from China. It can be claimed then, that it is indeed not purely domestic traffic.

If this is not correct, please forgive me.