Exhuming Second World War history in the forests of Brandenburg

In April and May 1945 battles raged as German troops tried to prevent the Red Army's march to Berlin. Around 29,000 victims of the Battle of Halbe, in Brandenburg have been buried in the cemetery in Halbe, many in unmarked graves. But tens of thousands more still lie in the nearby pine forests where they fell. One man is trying to exhume and identify those bodies. Emma Wallis reports.