Organizers said the exhibition may be taken to Iraq and Syria, two countries where ISIS has seized control of significant amounts of territory.

While many cartoonists were pleased to participate, some of them were apparently a little spooked, as well, and traveled under false names.

Also, if they have cartoons on other topics, the cartoonists might have been well advised to leave them at home. Iran is listed by the Committee to Protect Journalists as one of the 10 most censored countries and one of the 10 biggest jailers of journalists worldwide.