Terror on the Beach: Why Did It Happen?

Panorama returns to the scene of the killing of 38 tourists by a gunman on a Tunisian beach in June 2015. Thirty of those were British. As the inquests into their deaths get underway in London, Jane Corbin looks at the security failings that may have allowed the massacre to take place. Why wasn't there tighter security or a warning to holidaymakers to stay away from Tunisia after similar attacks? And should the Tunisian Government, the British tour operators and the British foreign Office bear any responsibility for what happened?