On the evening of 11 April 2003, a pair of RAF CH47 Chinook helicopters swept over Iraq's western desert towards a remote rendezvous point beside Route 10, the highway that begins life on the outskirts of Baghdad before running for mile after mile towards the border with Jordan.
As they approached their destination, the crews assumed they were on an operation that would be uneventful. Two days earlier Saddam Hussein's statue had been toppled after American tanks rolled into the Iraqi capital; three weeks later George Bush would stand in front of a banner saying "mission accomplished".
The helicopter crews had been told that a number of detainees were under armed guard at the side of the highway. They were to pick them up after dark and take them to a prison camp. What followed was far from routine: before the night was out, one man had died on board one of the helicopters, allegedly beaten to death by RAF personnel.