Worse than that, it was in the context of the ACLU's battle with the Patriot act, which means that they just tried to censor (for reasons of "national security") information about censorship (for reasons of "national security"). Here's the redacted paragraph:
"The danger to political dissent is acute where the Government attempts to act under so vague a concept as the power to protect 'domestic security.' Given the difficulty of defining the domestic security interest, the danger of abuse in acting to protect that interest becomes apparent."Mindblowing, huh?
Thanks to the Memory Hole for catching this.