Don McCullin, Photographer

The photograph of three-year-old Syrian boy Aylan Kurdi face down, dead on a Turkish beach galvanised a massive public response to the migration crisis on Europe's borders. Stephen Sackur speaks to world-renowned photographer Don McCullin. Over a career spanning six decades, he has taken unforgettable images that have defined a host of conflicts from Biafra to Beirut. Does he believe photographs can change the world?