Falcon Heavy hot fire as seen from Kennedy Space Center Press Site

The launch of SpaceX’s next resupply run to the International Space Station has been rescheduled for April 13, officials said Tuesday.

The U.S. military’s Space Development Agency, established in 2019 to fast-track new national security capabilities in orbit, plans to launch the first 10 satellites for a constellation of hundreds of missile tracking and data relay spacecraft Thursday on a SpaceX Falcon 9 rocket from California.

SpaceX test-fired a reused Falcon 9 booster Monday at NASA’s Kennedy Space Center in Florida, checking the rocket’s readiness for a planned liftoff Saturday with an Airbus-built commercial communications satellite.