When Anna Kozlov caught sight of the elderly man clambering out of a car in her home village of Borovlyanka in Siberia, she stopped dead in her tracks, convinced her eyes were playing tricks. There, in front of her, was Boris, the man she had fallen in love with and married 60 years earlier. The last time she had seen him was three days after their wedding, when she kissed him goodbye and sent him off to rejoin his Red Army unit.