I've lived in California all of my 48 years, and I've heard sonic booms many times before, including the big double boom of the shuttle coming in. This was much different. It was 3 or 4 seconds of what sounded like a jackhammer on my walls, followed by a window rattling boom.
If the Air Force is playing with a new secret toy, fine, say "no comment", but this story isn't working for me at all.