The controversy surrounding the BBC's Gaza documentary is a 'dagger to the heart' of the Corporation's claim to be 'impartial' and 'trustworthy', according to the BBC chairman. The documentary, narrated by the son of a Hamas official, has sparked backlash and raised questions about the BBC's credibility. The director-general has stated that he has 'lost trust' in the film and has removed it from iPlayer for further analysis.