Trident II (D5) (Alleged)

Second stage or whatever kicks in at (1:19).
[From comments at LAist.]

A bit later: For those of you who don't live in the shadow of the military-industrial-Congressional complex & the aerospace industry, here's a part of what goes on around here, from north of San Luis Obispo to who knows where:

Navy Strategic Systems Programs conducted the scheduled Trident II (D5) missile test flight at sea from the Kentucky, an Ohio-class ballistic missile submarine, in the Pacific Test Range off the coast of Southern California, a Navy spokesman said. 　

[...]

The missile was not armed and Strategic Systems Programs does not routinely announce missile testing. Information regarding the test launch of such missiles is classified prior to the launch, Perry said.

The test range is a massive area off Point Mugu in Ventura County, northwest of Los Angeles. The Navy periodically uses the range to test fire Tomahawk and Standard cruise missiles from surface ships and submarines.

[...]

It’s not clear if the test has anything to do with flight restrictions issued for Los Angeles International Airport for the coming week.

Nighttime flights into and out of the Los Angeles airport are to avoid passing over the Pacific Ocean just the west of the airport because the U.S. military has activated airspace there, Reuters reported.

The FAA and the military did not disclose the nature of the activities taking place near the second-busiest U.S. airport

[,,,]

But the FAA has indicated that military airspace over that patch of ocean was activated beginning on Friday night and continuing through Thursday night, airport officials said.

As a result, the airport will need to deviate from normal flight patterns during the next six nights, the statement said.

What the United Snakes Navy would like you to believe about the Sea Range.