2/6. Why do we have such a clear picture of what we were doing when John F Kennedy was shot, or when we heard
Princess Diana had died? Mariella Frostrup looks at flashbulb memory - when personal and public memories connect and are shared. She also asks writer Marina
Warner about collective memory and how groups become defined by a shared history. And the actor Kwame Kwei -
Armah looks at how generations of collective histories were wiped out by slavery, and why he revisited the land of his forebears looking for his real name and a sense of identity. Producer KatyHickman Repeated at 9.30pm