NYPD Infiltrates Critical Mass. I didn't see anything about this already posted and I am sure some people here will find it interesting. I think the following two quotes are particularly scary:
1) In granting the city's request, Charles S. Haight, a federal judge in Manhattan, ruled that the dangers of terrorism were "perils sufficient to outweigh any First Amendment cost."
2) On Sept. 12, 2002, the deputy police commissioner for intelligence, David Cohen, wrote in an affidavit that the police should not be required to have a "specific indication" of a crime before investigating. "In the case of terrorism, to wait for an indication of crime before investigating is to wait far too long," he wrote.