United Launch Alliance's years-long delays with its new Vulcan rocket have flipped the script for national security missions, ...

As new rockets and space companies arrive on the scene, this workhorse of a rocket, the Falcon 9, remains the most common ...

A SpaceX launch of a GPS satellite Friday marked the latest national security mission taken away from United Launch Alliance because of delays to its Vulcan rocket.

The worried reaction within space and national security agencies highlights the risks of government’s exclusive dependence on ...

President Donald Trump's threat to cancel Elon Musk's government contracts would have far-reaching implications, experts said ...

SpaceX launched an advanced GPS satellite today (May 30) on record-breaking short notice. A Falcon 9 rocket is lifted off ...

WASHINGTON — A SpaceX Falcon 9 rocket launched the U.S. military’s latest Global Positioning System (GPS) satellite on May 30 ...

Escalating tensions between Elon Musk and Donald Trump raise concerns about the stability of SpaceX's contracts with Nasa and ...

A public spat between Elon Musk and US President Donald Trump has put over $22 billion in SpaceX government contracts at risk ...