War frames: imprisoned ex-servicemen depict their experiences in Iraq at the Venice Biennale 

"The reason I used prisoners is because this work is about the nature of criminality. I thought it was a good idea to have [the likes of Blair, Campbell and the former head of MI6 John Scarlett] drawn by people who’d been on the receiving end of their decisions."

Iraqi Sunni and Shiite Muslims bow their heads as they perform a joint Friday prayer at the Al-Khalan Mosque in central Baghdad. Iraqi Prime Minister Nuri al-Maliki has called worshippers to perform unified prayers between Sunnis and Shiites every Friday in a bid to curb sectarian violence. From picture desk live: the best news images of the day

Photograph: Ali Al-Saadi/Getty Images

Experience: I was a whistleblower

'Some people called me a traitor, but others thought I was a hero.' Photograph: Lance W Clayton/Wonderful Machine

Iraq then and now

The Associated Press photographer Maya Alleruzzo was based in Baghdad for more than four years, covering the 2007 troop surge and the end of combat operations. She has returned to see how the city has changed, visiting the scenes of photographs taken by colleagues over the past 10 years

Photo: Abu Nawas Street in Baghdad, where an Iraqi orphan was photographed in April 2003: Maya Alleruzzo/AP

A boy plays on a climbing frame in the Zawara amusement park in Baghdad on a Thursday afternoon, the beginning of the weekend. Hugely popular, new parks and public spaces have been springing up across the city.

From the series: Baghdad, 10 years after the Iraq invasion by Peter Beaumont

Guardian cartoonist Steve Bell takes us through some of his work at the time of the invasion of Iraq in 2003 and shares his views on the decisions made by George Bush and Tony Blair. He explains how he represents the reality of ‘shock and awe’. Cartoons are often seen as a low art form which is generally humorous, says Bell – but much of his Iraq war work is grisly

Cartoon: Steve Bell

Faces of war: hear the stories behind iconic images of Iraq conflict

They were the images that defined the conflict in Iraq: the pain of ordinary Iraqi civilians, the exhaustion of American soldiers. But what became of them? From Fort Polk, Louisiana, USA, to Tal Afar, northern Iraq, Guardian reporters track down the people behind the images and hear their moving stories

A 15-month investigation by the Guardian and BBC Arabic reveals how US colonel James Steele, a veteran of American proxy wars in El Salvador and Nicaragua, played a key role in training and overseeing US-funded special police commandos who ran a network of torture centres in Iraq. Another special forces veteran, General James Coffman, worked with Steele and reported directly to Lieutenant General David Petraeus, then commander of multinational forces in Iraq

• This is an edited version of a longer film. Watch our full-length film about James Steele

Photograph: Joe Klamar/AFP/Getty Images

From 24 hours in pictures - 29 May:

California, US: Arlington West memorial on the beach next to Santa Monica pier. Veterans for Peace installed the temporary memorial project as a place to mourn, reflect, contemplate, grieve and to honour and acknowledge those who have lost their lives, reflecting on the costs of war. The name, Arlington West, reflects the national cemetery of the United States, Arlington National Cemetery, a burial place of honour for fallen war heroes