Russia reacts after St. Petersburg attack; Zelensky's fight pushes world on brink of nuclear war?

St. Petersburg is burning after Ukrainian drones struck energy and military sites around Russia’s “Russian Davos” forum, embarrassing the Kremlin and igniting fires at key facilities like the Petersburg Oil Terminal and Kronstadt naval base. As Putin deploys a nuclear‑capable submarine near NATO waters and officials hint at nuclear escalation, the Barents Sea is turning into a dangerous flashpoint in the wider war.