Currently there's only two countries who have hypersonic missile, Russia and China. US need to join this research with Japan if they want to compete the hypersonic missile.
5:27 XL-UUV 2:18 BrahMos II might get hugely delayed due to what is happening in Russia, looks like Japan can catch up or even overtake the int'l market since the US is expected to not export theirs
Seems like you are not at the mood my friend, cannot make the conversation going on. I think you need to rest before visiting or make questions in advance