NORAD knows. How could they not?

During rush hour last night, a rocket was seen streaking across the sky over Los Angeles. The military professes bafflement. AFAIK, the FAA has had nothing to say.

California is end-to-end airports and Air Force bases -- including Vandenberg AFB, from which the Air Force launches missiles. With all those radars, how can the military not know exactly from where last night's rocket was launched and where it came down? I have to believe they do know. Hopefully, because they launched it (surely not meaning to send it over LA), and don't care to fess up. Regardless, because if anyone other than the US military launched it and the military can't track/trace it, that would be really scary.

I wonder if we'll ever get a truthful explanation?