Australia arrested a former US marine pilot whom the US has accused of training Chinese pilots, who faces an extradition hearing. While awaiting that hearing, he is being held in cruel conditions of isolation that call to mind the imprisonment of Julian Assange.

I don't understand how training Chinese pilots, if he did that, can be considered "arms trafficking" or "money laundering". Either that information is garbled, or it is some sort of newspeak. I also don't see how training them constitutes a crime. It behooves the US to explain.

It would be legitimate for the US, Australia and other countries to prohibit their ex-pilots from training Chinese pilots, but it is unconstitutional in the US to make that an ex-post-facto law.