From the National Lawyers Guild listserve:
At the RNC Critical Mass protest, we were constantly followed by police helicopters (along with the Fuji blimp!), but the police weren't using the helicopter's special infrared cameras to watch the violent arrests happening on Second Ave. No, they were using it to videotape people making out on a roof top.
Just watch the video.
http://wcbs.dayport.com/launcher/21950/?tf=video_player.tpl&Category_ID=48