Inside Iraq asks what lessons the world has learnt more than five years into the American military misadventure in Iraq.
It is often said that history repeats itself.
The Vietnam war in the 1960s, which dragged on for 14 years, is an almost direct parallel to the invasion of Iraq.
The route to Baghdad, however, was far more complicated.
The war split the western super powers and the UN.
George Bush, the US president, and Tony Blair, the former British prime minister, were convinced that the UN's blessing was not necessary to invade Iraq, prompting Kofi Annan, the then secretary-general, to label it an illegal war.
Critics charged that the biggest lesson of the war was the deception over Saddam's supposed weapons of mass destruction.
Our guest this week is Lord David Owen, a former British foreign minister.