Looks like the good days of Russia's war machinery has faced its first hurdle as soon as Russia braced India in the Kashmir struggle. <-- maybe this co-relation doesn't prove causation, but anyway : -)
Couple of years back Putin demoed two deadly weapons, one of which was a nuclear powered missile. That's nuclear "powered" not "warhead". The big point was that it can fly indefinitely on air going around the globe and strike America from unexpected direction.
Too good to be true? Well might be.
A test of that missile caused a large nuclear explosion in mid air in Russia. You read that right, nuclear explosion. And radiation spiked. Which now can be detected form Europe.
Within that same period a very large explosion took place in an arms depot in Siberia, which from afar looked more like a nuclear explosion taking place than conventional explosive. And three days later another second large explosion took place there.
But the later ones might not be nuclear, the first one was.