Russia has begun another exercise of its strategic nuclear arsenal on the orders of President Vladimir Putin, the Kremlin announced on Tuesday. Putin followed the “strategic deterrence” drills by video link, the Kremlin said. Military officials said the exercises featured submarines and missile-carrying bombers. An intercontinental ballistic missile was also test-launched. Defence Minister Andrei Belousov said the forces “will practicedelivering a massive nuclear strike in retaliation to anenemy nuclear strike,” according to the state-run TASS news agency. Russia would not engage in a nuclear …