The U.S. military’s next GPS navigation satellite was ready for launch from Cape Canaveral at 9:43 p.m. EDT Friday (0143 GMT Saturday) aboard a SpaceX Falcon 9 rocket. But SpaceX aborted the countdown just two seconds prior to liftoff.

Follow the key events of the Falcon 9 rocket’s ascent to orbit with 60 satellites for SpaceX’s Starlink broadband network.

The Starlink 10-53 mission was the 49th mission dedicated to flying SpaceX’s broadband internet satellites to low Earth orbit in 2026. Liftoff from pad 40 at Cape Canaveral Space Force Station 8:57 a.m. EDT (1257 UTC).