Just because you're paranoid doesn't mean no one's out to get you...
Stealth helicopters have been circling above L.A. neighborhoods as part of a joint military exercise coordinated with the Los Angeles Police Department, the Eastsider LA blog discovered. An earlier effort to photograph one of these black helicopters as it flew by at night was somewhat less than successful.
(h/t LA Observed)
*Updated: Looks like the military maneuvers have spread farther and wider than just the neighborhoods around downtown. Larry Altman at the Daily Breeze reports sightings of helicopters over San Pedro and Rancho Palos Verdes.