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United Launch Alliance's Vulcan rocket completed its second successful flight on Friday, an important step for future use.

United Launch Alliance's Vulcan rocket, under contract for dozens of flights for the US military and Amazon's Kuiper ...

Vulcan is slated to replace the company's venerable Atlas V rockets in the coming years, and the company deemed the Cert-2 ...

Two boosters are attached to the rocket for Friday's launch. The red-and-white Vulcan was designed to replace ULA’s workhorse ...