Really, I'm not at all sure these "hypersonic" missiles exist. The US, China, and a team of Russia and India are working on them. There have been some tests, including a Chinese test in January that caused all the news coverage. Many of these tests, including 2003-4 US tests in the X-43 program, have led to hypersonic scramjet meltdowns and explosions. This seems like something the propeller-heads need another decade to work on. If nobody can get a test vehicle to work, and even the super-well-funded US can't get a practical missile out of the technology, it seems premature to consider this particular bit of Buck Rodgers fantasy a game changer.