It’s twenty years since the US and UK invaded Iraq to overthrow Saddam Hussein. Kirsty Wark discusses the lead up to the war, the impact on the lives of Iraqis and the legacy.

Ghaith Abdul-Ahad left his job in Baghdad and became a journalist during the Iraq War in 2003. He witnessed first-hand the liberation of his country from a megalomaniac leader and then its descent into factionalism and violence. In A Stranger In Your Own City he movingly recounts the very real human cost of the invasion, as well as the civil wars and rise of ISIS that followed.

Emma Sky volunteered to help rebuild Iraq post-invasion and went on to serve as the representative of the Coalition Provisional Authority in Kirkuk and then as a political advisor to the US army in the following decade. Now an academic at Yale University, she looks back at why the Iraq invasion failed and its implications across the region. She's the author of The Unravelling and In a Time of Monsters: Travelling in a Middle East in Revolt.

The BBC’s Security correspondent Gordon Corera was a young reporter during the frenetic build up to the war, talking to spies, defectors and politicians. In a 10-part series – Shock and War: Iraq 20 Years On (from 13th March at 1.45 and on BBC Sounds) – he talks to those at the centre of that decision to go to war, and looks at the far-reaching consequences, from trust in politics, security and liberal intervention.

Producer: Katy Hickman