'Restoring Leonardo' 500 years after Da Vinci's death

Leonardo da Vinci died 500 years ago. In Italy, the birthplace of Leonardo, preparations are under way for a number of exhibitions to celebrate his genius, including one of his famed sketches and notebooks in the northern city of Turn. But before they go on display, they've spent months in Rome at a unique clinic for ancient books and artwork. Megan Williams has this report from Rome.