Charlie Hebdo editorialist Patrick Pelloux (right) and cartoonist Renald Luzier, known as Luz (left), join a march in Paris on Sunday. (AP photo)

The staff of Charlie Hebdo said the past few days have been hard, but they are "happy" to have put out a magazine under the most intense of situations. After the shooting, Renald Luzier, the cartoonist known as Luz, said they knew they had to start working. "We didn't know how we were going to start," he said. "I didn't know if it was going to be possible for me to draw, quite honestly." But he did. First a cartoon that served as "catharsis," and then, after many iterations, he drew a cartoon of Islam's Prophet Muhammad shedding a tear and holding a sign with what's become the slogan of this tragedy: "Je Suis Charlie," or "I am Charlie." Above it all, there's a headline that reads, "All Is Forgiven"/National Public Radio.

That takes guts to publish again, so soon after the murderous attacks by Islamic extremists.

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