Unmarked chopper patrols New York City from above

"They don't even know we're here," said crew chief John Diaz, speaking into a headset over the din of the aircraft's engine.
The helicopter's unmarked paint job belies what's inside: an arsenal of sophisticated surveillance and tracking equipment powerful enough to read license plates — or scan pedestrians' faces — from high above the nation's largest metropolis.
Police say the chopper's sweeps of landmarks and other potential targets are invaluable in helping guard against another terrorist attack, providing a see-but-avoid-being-seen advantage against bad guys. http://news.yahoo.com/s/ap/20080524/ap_on_re_us/stealth_helicopter&printer=1;_ylt=AhB5AZ59GoySYHONo5fhZuBH2ocA