This seems the most credible to me. I wonder which nation state has these machines? Because they are clearly incredible. It would certainly be nicer than using

This seems the most credible to me. I wonder which nation state has these machines? Because they are clearly incredible. It would certainly be nicer than using conventional aircraft when flying Australia to Europe, even at the expense of experiencing high G forces. I think the press articles we see about this are part of a broader information war campaign trying to plant red herrings to confuse other nation state actors.