A United Launch Alliance Vulcan rocket carrying classified Space Force payloads suffered a booster problem but apparently ...

The Vulcan has launched on its second-ever national security spaceflight in what will be the biggest test yet for ULA's ...

The United Launch Alliance is planning for the Vulcan to become its workhorse rocket. It faces its biggest test yet in its next launch.

ULA's Vulcan is due to send up on Aug. 12 a pair of U.S. Space Force national security satellites on one of the company's most ambitious-ever launches. The Vulcan rocket, which has flown twice before, ...