Live coverage: Soyuz crew lands in Kazakhstan

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.

SpaceX conducted a static fire test of the SuperDraco abort thrusters on the company’s Crew Dragon spacecraft Wednesday afternoon at Cape Canaveral Air Force Station.

A new European satellite carrying instruments to track changes in the world’s oceans, measure receding ice sheets and chart vegetation growth climbed into orbit Wednesday on top of a Russian Rockot launcher.