USSF-366
SpaceX's Falcon 9 Block 5 is set to launch USSF-366 on August 15, 2026 from Space Launch Complex 4E, Vandenberg SFB, CA, USA. The countdown above is shown in your local timezone; the status updates live as the flight moves from To Be Confirmed to Go, and if it slips or scrubs. USSF-366 is a classified mission for the United States Space Force. It is possibly a batch of classified LEO satellites for a US 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.
See it in person — plan a viewing trip
Watching from Vandenberg SFB, CA, USA? Here's how to make the trip — book a room, grab a viewing tour, and bring something to see liftoff up close.
Gear that makes liftoff and stage separation worth the trip:
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Where to watch USSF-366
SpaceX carries the official webcast on its own channel. When the stream link is published we surface it here, and embed the player on launch day. For the full rundown of where every provider streams — and how to catch it in your timezone — see how to watch a rocket launch live. New to the jargon? The launch glossary explains scrub, hold, MECO and the rest.