John Bolton, the former ambassador to the United Nations, will have to avoid a "citizen's arrest" as he speaks tonight at the Hay Festival in Wales.

George Monbiot, a columnist for British newspaper the Guardian, accuses the former Bush administration official of being a "war criminal" for his role in planning the Iraq War.

Monobiot lays out the charges on his website.

The director of the festival tells the London Telegraph that "the Hay Festival has sought the advice of both police and lawyers, and has been unequivocally assured that a citizen