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 ...

Reports suggest that the US Space Force is pausing missions on the Vulcan rocket until an anomaly observed during a February ...

The U.S. Space Force is putting an indefinite halt on all national security missions aboard United Launch Alliance's Vulcan ...

United Launch Alliance suffered yet another fiery burn-through on one of its solid rocket boosters during a national security mission Thursday.

United Launch Alliance said it is reviewing data after one of the solid rocket motors on its Vulcan rocket appeared to experience a problem during a U.S. Space Force mission early Thursday. The ...

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

The Vulcan rocket leapt off its pad at 4:22 a.m. EST, lighting up the Florida coast before a problem inside one of its strap-on boosters turned a routine climb to orbit into a high-stakes anomaly.

WASHINGTON — A United Launch Alliance Vulcan Centaur rocket lifted off early Feb. 12 on a multi-manifest national security mission, sending payloads directly to geosynchronous orbit more than 22,000 ...

Texas-based Firefly Aerospace is planning to launch its Alpha rocket on its first spaceflight from Vandenberg since April ...

A ULA Vulcan rocket launched a Space Force mission from Cape Canaveral on Feb. 12. Sparks were observed coming from a solid rocket booster shortly after liftoff, which ULA is reviewing. The mission, ...