The 9/11 attacks on the World Trade Centre shook the world and brought about a change in the world order. Ten years on from those momentous events, Radio 4 reflects on their impact with a collection of programmes - from 2011 and from the archive.
In Crossing Continents David Shukman reports on the thousands who have become ill from the toxic dust that blanketed Lower Manhattan after the Twin Towers collapsed on September 11.
Woman's Hour talks to Eliza Manningham-Buller, the former Director-General of MI5 who led MI5 through substantial change in the wake of 9/11 and the growing threat from Al-Qaeda.
Mohsin Hamid talks to James Naughtie and readers about his bestselling book The Reluctant Fundamentalist on Bookclub.
In this Book of the Week, Five internationally acclaimed writers use an open letter to consider the consequences of the events of September 11 2001 for Britain, America and the world.
Eliza Manningham-Buller, former head of MI5, delivers three lectures on the nature of security. The lectures will be broadcast on 6, 13 and 20 September.
Navid Aktar meets fellow British Muslims from across the country to gauge how the events of 11 September 2001 changed their lives, loyalties and beliefs.
Presented by Paddy O'Connell, the programme features television and radio output from the 24 hours before the attacks. A portrait of New York, America and the wider world as it was - the day before.
A dramatised story reconstructed from multiple documents of how George Bush and Dick Cheney responded in the first few hours after the 9/11 attacks and how the decisions they took triggered the invasions of Afghanistan and Iraq.
BBC security correspondent Gordon Corera looks into the shadowy world of Britain's security service, MI5, forced into radical change after 9/11.
The inside story behind the coalition set up in the wake of the terrorist attacks of September 11th.
BBC security correspondent Gordon Corera reviews the search for the world's most wanted terrorist and how US officials now dispute who was responsible for the failure to kill him before 2011.
The BBC security correspondent Gordon Corera gains unprecedented access to Britain's ultra secret listening station where super computers monitor the world's communications traffic.
BBC security correspondent Gordon Corera looks inside Britain's Secret Intelligence Service. He talks to senior intelligence officers, agents and diplomats about the shadowy world of espionage.
Frank Gardner, BBC security correspondent, traces the rise of political Islam in Britain and around the world - one of the most important ideological forces of the past century.
Jon Manel looks at the potential problems in closing the detention facility and investigates claims that the US is already breaking international law.
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