ULA Vulcan Launch completes its first National Security Space Launch mission, taking the reins from the Delta IV Heavy for ...

United Launch Alliance's Vulcan Centaur lifted off for the third time ever in an experimental launch to put navigation ...

United Launch Alliance was supposed to fly its first national security mission on its new Vulcan rocket three years ago. It ...

What was the mysterious white spiral flying in the night sky as stargazers looked up during the Perseid meteor shower peak ...