Je Suis Charlie, by Magnus Shaw. ("Charlie Hebdo" is partially named after Charlie Brown; in one of its incarnations, it carried *Peanuts* translated into French. "Hebdo" is shorthand for "hebdomadaire," French for "weekly.
The cartoonist behind the classic Asterix cartoon has come out of retirement specifically to pay tribute to the victims of the Charlie Hebdo shootings. Albert Uderzo created two images, one with the Gallic hero uppercutting an enem.