A senior Russian official discussed ongoing nuclear testing practices and strategic stability, stressing that while physical tests have not occurred, computational and mathematical modeling continues constantly. He confirmed that Russia’s Novaya Zemlya test sites remain ready for use if needed. The official warned that if other countries resume nuclear testing or withdraw from existing treaties, Russia will respond in kind. He linked the issue to global strategic stability and referenced advanced Russian weapons systems, including the Burevestnik and Poseidon, noting that President Vladimir Putin had already announced them in 2018, saying skeptics “will have to believe now.”