New Vulcan Centaur rocket may test-fire its engines on the launch pad for 1st time on May 25

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United Launch Alliance (ULA) is gearing up for a critical test firing of its next-generation Vulcan Centaur rocket, and it could happen as soon as this week.

New Vulcan Centaur rocket may test-fire its engines on the launch pad for 1st time on May 25 : Read more