Bistrot or bust? Why France's famed cafés are disappearing

This week, we're turning our eye to the bistrot, France's answer to the pub. Bistrots have played a central part in French culture for more than a century. But although hundreds of eateries open their doors across France every year, an even greater number are shutting up shop. That's been the overall trend for the past few years. So what's the cultural significance of French bistrots and what's being done to save them? We take you to find out.