PUTIN is said to have ordered the deadly 16,000mph Satan 2 to be battle-ready sparking fears of a major escalation in the war. The threatening move sees the killer nuclear capable RS-28 Sarmat - dubbed "the world’s deadliest weapon" - being on "combat duty." It was announced by Russian state news agency Tass despite testing failures and delays. Head of Russia's Strategic Missile Forces, Col-Gen Sergei Karakayev said that work continues to place the missile on “combat duty,” Tass reported. He said: "As of today, fifth-generation Yars and Avangard missile systems have been introduced in the strategic missile forces. "Work...