"Vulcan Launch Delayed Until Fall Due to Payload Questions"

After the successful debut of the Vulcan rocket, United Launch Alliance faces uncertainty over its next launch due to payload readiness, particularly the Dream Chaser spacecraft for Sierra Space. The company aims to obtain certification from the Space Force for national security payloads, but the spacecraft's potential delay may lead to alternative launch options. Additionally, ULA is eager to exit the certification phase and begin flying contracted missions, but the availability of BE-4 rocket engines remains a pacing item in the supply chain. ULA has reportedly sought an expedited certification process from the Space Systems Command based on the rocket's initial launch data, similar to SpaceX's single-flight certification for the Falcon Heavy rocket in 2018.