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. 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.