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US Space Force certifies new Vulcan Centaur rocket to launch national security missions
"Vulcan certification adds launch capacity, resiliency and flexibility needed by our nation's most critical space-based ...
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Starliner launch delayed to at least May 17 to replace suspect valve in Atlas 5 rocket
The culprit: a pressure relief valve in the rocket's Centaur upper stage liquid oxygen ... The ULA team plans to haul the Atlas 5 and its mobile launch platform back to the nearby Vertical ...
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Planned crewed launch of Boeing's Starliner spacecraft scrubbed
An Atlas 5 rocket carrying astronauts for the first ... regulation valve on the liquid oxygen tank of the Atlas 54 rocket's Centaur upper stage and determine whether it is necessary to replace ...