Twenty five years ago al-Qaeda militants hijacked four commercial planes in the US and flew two into the World Trade Center in New York and one into the Pentagon, while the fourth crash-landed in a Pennsylvania field.
Almost 3,000 people were killed on that day and the world was changed forever.
How the US responded to that attack on home soil reverberates still – through everything from airport security to geopolitics – and above all, America’s place in the world. The attack also prompted a rise in Islamophobia.
Denis Staunton, Irish Times correspondent and author of the daily Global Briefing newsletter, explores how the world changed after 9/11 and what might have happened if the US had responded to the attacks in a different way.
Presented by Bernice Harrison. Produced by Declan Conlon.