The iconic photograph of the leaders of the West, marching with other heads of state down Avenue Voltaire in the City of Light, was missing only the image of the president of the United States. Indeed, that was the image vivid in its absence. Prime Minister David Cameron of Britain, President Francois Hollande of France, Chancellor Angela Merkel of Germany and Prime Minister Benjamin Netanyahu of Israel marched in solidarity with the people of France and indeed all civilization, more than 3 million men, women and children in the greatest outpouring of celebration since the liberation of Paris from the Nazis in 1944. Even Mahmoud Abbas, the president of the Palestinian Authority — which knows a thing or two about inflicting the pain of terrorism — managed to work his face into some of the photographs.