Someone grab a rope
"At Nuremberg, in early October 1945, the four prosecuting nations -- the United States, Great Britain, France and Russia -- issued an indictment against 24 men and six organizations of the Nazi Germany. Of that 24 only 21 eventually sat down in the trial. The individual defendants were charged not only with the systematic murder of millions of people, but also with planning and carrying out the war in Europe. Twelve Nazi officials were sentenced to be hanged, three sentenced to life in prison, four were given prison sentences of 10-20 years, and the rest were acquitted.
Presently, the ongoing American and British slaughter of thousands of Iraqi and Afghan civilians constitutes a blatant war crime. Average legal skills should be able to prove that a similar case for the prosecution against the current coalition leaders can easily be constructed on comparable lines.
In September 2004, the incumbent UN Chief Kofi Annan made a very clear statement. Talking to BBC Annan said "the US-led invasion of Iraq was an illegal act that contravened the UN charter." Being the UN Chief, and the custodian of International law, he should have known what he was talking about.
The consequent unlawful war of aggression, the killing of civilians and abuse of prisoners constitute war crimes as clearly as the UN Chief's statement.