Russia is the only country to have successfully aired them. Where other nations are supposedly developing. Russia had huge disasters in the process of testing them. But they supposedly don't have the raw materials to fully equip them across their entire military. This has led to increasing lasers being fitted on modern navy's.

North Korea with hypersonic, umm no. They haven't even got satellites. Apart from any on lease. But hypersonics. Some of the most recent technology. Who is outfitting them. Certainly it is simply a scare to South Korean landmark testing?