Pictures: World leaders march on streets of Paris over Charlie Hebdo killing

 World leaders including David Cameron of United Kingdom, Angela Merkel of Germany, Isreal's Benjamin Netanyahu and others joined French president and thousands of France nationals in a solidarity march on the streets of Paris this afternoon to protest the killing of 12 Charlie Hebdo cartoonists. The march began in Place de la République and will end at Place de la Nation. More pics after the cut...