LONDON: The director of a canceled BBC documentary about Gaza said the stories told in the film remain important and should be shown, while acknowledging a “serious” mistake that led to the program being withdrawn. Jamie Roberts, who co-directed “Gaza: How to Survive a Warzone,” apologized for the failure of independent production company Hoyo Films to disclose that the father of the 13-year-old narrator of the documentary was a Hamas official. The BBC removed the documentary from its iPlayer st
