NASA’s Space Launch System (SLS) is ready to fly with its four shuttle-era engines. The rocket, outfitted with the RS-25 ...

Without Musk's SpaceX, the US would be second place to China. If Trump deports Elon Musk, he'll set US space travel back ...

The second in a doubleheader launch, a SpaceX rocket took off on a record-breaking flight at 2:28 a.m. July 2.