thats russian engineering at its best, quite of lot of other examples are out there too, including the biggest supersonic airliner, worlds biggest plane, best machine gun ever made - AK47 (that can also still fire after submerged in water) best electronic valves (i have some -including the highly sought after 6H8C) the list goes on, not to mention lots of the worlds best chess players came from Russia too, (I also got one of the very best Russian book about Chess - from Russia with extraordinary quality of paper that was typical during their then-communist regime.