RT joins daring divers as they train to plunge to the icy depths of Russian rivers. Ice diving in Russia is a popular sport, but it is not something to be taken lightly. Divers end up under 30-cm-thick ice. Their only contact with the surface is a rope, their safety line in case they get lost.<br /><br />RT on Facebook: http://www.facebook.com/RTnews <br />RT on Twitter: http://twitter.com/RT_com
