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Boing Boing](http://www.boingboing.net/2009/05/17/nypd-directive-on-th.html) says:

Here’s a scan of the NYPD Operations Order “Investigation of Individuals Engaged In Suspicious Photography and Video Surveillance,” a document issued last month by the Department telling cops in no uncertain terms to stop hassling photographers who shoot in public places, and to get a warrant before searching a camera