The test comes days after President Vladimir V. Putin announced the previous trial of another Russian nuclear weapon.

RUSSIA has successfully tested a nuclear-capable Poseidon super torpedo, according to Putin – who boasted it is unstoppable. It’s the second aggressive nuclear test in a matter of

The cancellation also comes in the wake of Russia’s high-profile testing of two nuclear-powered strategic systems, the Burevestnik cruise missile and the Poseidon underwater drone, both capable of carrying nuclear warheads across long distances.