A SpaceX Falcon 9 launched the Space Development Agency’s (SDA) Tranche 1 mission from Space Launch Complex 4 East (SLC-4E) at Vandenberg Space Force Base in California on Sept. 10, 2025. [Full Story](https://www.space.com/space-exploration/launches-spacecraft/spacex-launches-1st-21-satellites-for-advanced-new-us-military-constellation) Credit: SpaceX