Reading news about this research over years, hard to be sure when the "world-first" event actually happens. For example, a couple of years ago (?) similar achie

Reading news about this research over years, hard to be sure when the "world-first" event actually happens. For example, a couple of years ago (?) similar achievement was claimed by Energomash in Russia. In any case this seems to be wonderful technology, when made working. Kudos to scientists and engineers involved, it's hard research.