Sharpen your memory. Part 2, Memorialism - the collective memory.

The second in a six-part series in which Mariella Frostrup looks at how our memory defines who we are. In this part we hear about so-called 'flashbulb' memory - when personal and public memories connect, and are shared. Martin Conway, Marina Warner and Kwame Kwei-Armah talk about collective memories and listeners contribute their own experiences.