13:00BBC News Special9/11: Twenty Years OnBBC World News Duration: 5 hours, 30 minutes Sat 11th Sep 2021, 13:00 on BBC WORLD NEWS Middle EastSpecial coverage of events being held to commemorate the 20th anniversary of the 9/11 attacks , with Laura Trevelyan in New York.GenresFactualBrandBBC News Special Source: BBC Online