When an elite team of American special forces stormed a compound in Pakistan and killed the world's most wanted terror target it was the high point of Barack Obama's presidency. But as more and more information emerges, the doubts about the official account of Osama Bin Laden's death have been raised - to the point where veteran investigative journalist Seymour Hersh has now alleged that the whole story was fabricated. For the BBC's award winning This World strand, Jane Corbin examines the evidence for this supposed conspiracy and uses a treasure trove of newly released documents to reconstruct Bin Laden's life in his secret compound.