The Space Force won’t be launching on United Launch Alliance Vulcan rockets until the company figured out why parts of its rocket boosters burn off on launch.

Vulcan is central to ULA’s effort to replace its Atlas 5 rocket and compete more directly for national security launches. With Vulcan missions on hold, the Space Force is now reliant solely on SpaceX ...

United Launch Alliance flew its Vulcan rocket for only the fourth time early Thursday, but suffered yet another fiery burn ...

The U.S. Space Force is putting an indefinite halt on all national security missions aboard United Launch Alliance's Vulcan Centaur, following a repeat anomaly with the rocket's side boosters.

A ULA Vulcan rocket launched a Space Force mission, but an unexpected light show from its boosters sparked questions. Here's ...

As a ULA Vulcan bolted into the early Thursday skies over Cape Canaveral, many witnessed a solid rocket booster issue.

The latest flight of United Launch Alliance’s Vulcan rocket was more than another routine climb to orbit. It was a high‑stakes national security mission, a live engineering stress test and a preview ...

Add Yahoo as a preferred source to see more of our stories on Google. The United Launch Alliance Vulcan rocket took off on the Space Coast from Launch Complex 41 at Cape Canaveral, but what many ...

United Launch Alliance suffered yet another fiery burn-through on one of its solid rocket boosters during a national security mission Thursday. The Vulcan rocket lifted off from Cape Canaveral Space ...

The United Launch Alliance Vulcan rocket took off on the Space Coast from Launch Complex 41 at Cape Canaveral, but what many noticed were the sparks seen coming from the rocket. After an initial delay ...