Eyewitness: Tragedy of Soviet nuclear submarine K-27

Eyewitness: Tragedy of Soviet nuclear submarine K-27- The BBC speaks to Vyacheslav Mazurenko, who when 22 was serving as a chief warrant officer on a Soviet nuclear-powered submarine, the K-27. He and others were poisoned when a liquid metal-cooled reactor leaked. The submarins was later sunk into the Kara Sea.