Isaacman also said the agency would halt work to develop a more powerful version of the SLS rocket's upper stage, known as the Exploration Upper Stage, or EUS. Instead, NASA will go forward with a "standardized," less powerful stage but one that will minimize major changes between flights and utilize the same launch gantry.
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He added: "For the CEO to tell workers that they were redundant with immediate effect, on a conference call with only 25 minutes notice, has echoes of P&O and is deplorable."