The Italian glassmaker who protects the Mona Lisa

​Precious objects or artworks are at risk of theft, vandalism, even terrorism in some cases. Protecting them is quite a task. But whose task? Outlook's Alessia Cerantola has been to meet one of those people, an Italian man called Alessandro Goppion who's been given the job of protecting some of the most valuable objects in the world including the Mona Lisa painting.