To mark the fourth anniversary of the invasion of Iraq, groups worldwide engaged in anti-war actions between 17 and 20 March - from mass marches and vigils naming the dead, to protests outside military recruitment centres. According to US network United for Peace and Justice, up to 1,000 local events were planned across the States. In Spain an estimated 400,000 took to the streets of Madrid, and protests also took place in Australia, New Zealand, Hungary and Canada.
In Britain,…