SpaceX launches classified mission for the US Space Force from California (video)

SpaceX launched a secret mission for the U.S. Space Force today (Sept. 10) from California's central coast.

A Falcon 9 rocket lifted off from Vandenberg Space Force Base today at 11:42 a.m. EDT (1542 GMT; 8:42 a.m. local time), kicking off a mission called USSF-153.

The rocket's first stage came back to Earth about 8.5 minutes later, landing in the Pacific Ocean atop the SpaceX drone ship "Of Course I Still Love You." It was the 27th flight for this particular booster, which is designated B1801. The record for a SpaceX rocket is 37, set last month during a launch of the company's Starlink internet satellites.

a black and white rocket rests on the deck of a ship at sea — The first stage of a SpaceX Falcon 9 rocket rests on the deck of a drone ship after launching the USSF-153 mission from Vandenberg Space Force Base in California on Sept. 10, 2026. (Image credit: SpaceX)

USSF-153 is a classified mission, so little is known about its payloads — what they are or where exactly they're headed. We didn't get much clarity from the webcast, which ended shortly after the Falcon 9's first stage landed.

However, the location of that touchdown provided some potentially useful information about USSF-153, according to NextSpaceflight.com.

The mission might be carrying "a batch of classified LEO [low Earth orbit] satellites for a U.S. government entity based on SpaceX's Starshield satellite bus, based on locations of rocket stage drop zones being exact fits with previous Starlink Group 15 launches," the outlet wrote.

"Starshield leverages SpaceX's Starlink technology and launch capability to support national security efforts," SpaceX wrote in a description of the Starshield program.

Previous Booster 1081 launches

Today's launch was the 104th Falcon 9 mission of 2026. Eighty of the rocket's flights this year have been dedicated to building out the Starlink megaconstellation, which currently consists of more than 11,000 active spacecraft.

Editor's note: This story was updated at 11:55 a.m. ET on Sept. 10 with news of successful launch and rocket landing.

Michael Wall is the Spaceflight and Tech Editor for Space.com and joined the team in 2010. He primarily covers human and robotic spaceflight, military space, and exoplanets, but has been known to dabble in the space art beat. His book about the search for alien life, "Out There," was published on Nov. 13, 2018. Before becoming a science writer, Michael worked as a herpetologist and wildlife biologist. He has a Ph.D. in evolutionary biology from the University of Sydney, Australia, a bachelor's degree from the University of Arizona, and a graduate certificate in science writing from the University of California, Santa Cruz. To find out what his latest project is, you can follow Michael on Twitter.