Russia is continuing work to put its 'unstoppable' Satan II intercontinental ballistic missile - part of its terrifying strategic nuclear arsenal - on combat duty, Moscow's state media has revealed. The Satan II missile, also referred to as the RS-28 Sarmat, is designed to deliver nuclear warheads to strike targets thousands of miles away in the United States or Europe, but its development has been dogged by delays and testing setbacks. In September, Putin faced humiliation after his Satan II missile exploded, obliterating Russia's only test site for hypersonic weapons. As a result, experts said that the test programme for...