TOPSHOTS A slogan reading "Nous sommes tous Charlie" (We are all Charlie) in Arabic and French has been put on the facade of the Institute of the Arab World (Institut du Monde Arabe, IMA in French) in Paris, on January 12, 2015, a day after marches that drew nearly four million people across the country in tribute to the 17 victims of a three-day killing spree in Paris. The killings began on January 7 with an assault on the Charlie Hebdo satirical magazine in Paris that saw two brothers massacre 12 people including some of the country's best-known cartoonists and the storming of a Kosher supermarket on the eastern fringes of the capital which killed 4 local residents. The work was proposed by Tunisian gallerist and street art specialist Mehdi Ben Cheikh. AFP PHOTO / JOEL SAGET .