SPACE By Andrew Jones 4/25/2023
An anomaly during testing of Centaur upper stage has grounded the new rocket for a spell.United Launch Alliance's plans for the first launch of its new Vulcan rocket have been complicated by a violent explosion during testing of the rocket's upper stage.
ULA was targeting May 4 for the first launch of the Vulcan vehicle from Cape Canaveral Space Force Station in Florida, with the rocket arriving at the site in late January.
However, on March 29, a Centaur upper stage suffered an anomaly and exploded during testing at NASA's Marshall Space Flight Center in Alabama. The incident was first reported by Ars Technica (opens in new tab).
More:
https://www.space.com/ula-vulcan-rocket-testing-anomaly-launch-delay
