Right, but the 1960s US missile was also nuclear-powered and required no fuel other than the nuclear-powered heater. Now, given the 60 year time difference between the two, what is the Russian missile doing that’s any different?Yesterday, I watched a short documentary on newly built IBCM RS-28 Sarmat (Satan-2 in NATO classification). The missile is the newest. Last time it was tested in December 2018. It's large sophisticated able to carry nuclear and _non-nuclear_ warheads. It can fly over southern Pole to avoid defense systems reaching western hemisphere. It can hit any target on the planet within 30 minutes giving GPS (Russia uses its GLONAS) technology with precises. The missile weighs 200 tons. It
You can't see how it differs? On one hand nuclear technology on its own, on the other application of nuclear energy.