John Hopewell Chief International CorrespondentDirector-producer David Beriáin, one of the key figures on Spain’s new documentary scene, was killed on Monday while making a anti-poaching documentary in Burkina Faso.Beriain, accompanied by cameraman Roberto Fraile, was traveling in a convoy near the Arli National Park when it was attacked by armed men who arrived on two trucks and a dozen motorbikes, according to El País.The Spanish newspaper added that Beriáin and Fraile had got out of one of