Numerous remarkable TV and radio documentaries are running to mark the ten since since the September 11, 2011 terror attacks on the United States.
The 9-11 attacks on the World Trade Centre shook the world and brought about a change in the world order, the BBC writes. Ten years on from those momentous events, Radio 4 reflects on their impact with a collection of programmes – from 2011 and from the archive.
The former director-general of the British security service MI5, Eliza Manningham-Buller, gives her BBC Reith Lectures: the first; entitled Terror.
On the tenth anniversary of the 9/11 attacks on the United States, she reflects on the lasting significance of that day, asking was it a terrorist crime? An act of war? Or something different?




