Inside Europe: Stolpersteine: one victim, one stone

In the 1990's German artist Gunter Demnig created a project to commemorate the victims of Nazism: 'Stolpersteine' or 'stumbling stones' — small brass blocks set into pavements. He's on the road for over 300 days a year, laying these commemorative memorials in front of the victims' former homes. One of Gunter Demnig's most recent stops was the north Italian city of Bologna. Dany Mitzman reports.