ULA's Vulcan is replacing the company's workhorse Atlas 5 rocket and the already-retired Delta 4 family of launchers.

United Launch Alliance completed its first US national security mission with the newly developed Vulcan rocket, a key test of ...

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

The United Launch Alliance is launching its powerful Vulcan rocket on its first national security mission for the U.S. Space ...

The silver-and-red Vulcan — equipped with four side-mounted solid rocket boosters — will lift off Tuesday, Aug. 12, from Cape Canaveral Space Force Station.

A United Launch Alliance Vulcan rocket is gearing up to carry a classified national security payload into space Tuesday night ...