Four years ago  this week, Paris was shocked by the terror attack on the satirical magazine Charlie Hebdo. French street artist Christian Guémy, aka C215,  has paid tribute to the eleven victims of the horrific attack with a mural . At the bottom of the work is a quote from victim Stéphane Charbonnier, better known as Charb, from 2012:  ”  I am not afraid of retaliation, I have no kids, no women, no car, no credit. It may be a little pompous what I am going to say, but I prefer to die standing than to live on my knees  “.