Activity has been all over the valley. i'm at Ray Rd and the I10 and I had two helicopters fly so fast and so low that my entire house shook. By the time i got outside, i saw one helicopter tailing another helicopter that was conpletely blacked out. They set off car alarms on the street. About 15 minutes later, two more passed over. The first helicopter was completely blacked out. The second one was right on its tail. About 15 minutes later a single, blacked out helicopter with no lights flew low and fast directly over us again, it shook the windows. I have no idea whats going on.