Vladimir Putin's huge 640ft Belgorod submarine has set sail.The large vessel, able to sink aircraft carriers and dubbed the 'city killer' has sailed out on open waters for the first time.It's believed the Belgorod is the largest submarine to be built over the past 30 years.It was put to sea for the first time this week, as Russia flexed its naval muscles, following the incident with the British destroyer HMS Defender in the Black Sea.Warning shots and bombs were deployed near the Royal Navy ship after Russia claimed it was in their waters.Experts fear the 79-ft long torpedoes, dubbed Poseidon, could be detonated underwater to cause a radioactive tsunami.The devastating impact would threaten coastal cities with waves of up to 300ft high.The.
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