AvWeek’s Frank Morring has explained the above figure of $16 billion in his article about the 17 June Review of US human spaceflight plans commitee meeting. But he doesn’t detail why and so I am guessing that its a mixture of shutting down the solid rocket booster infrastructure and then years later starting it back up again and not developing the J-2X engine for a new Delta IV upper stage and having to restart that work years later
End of Ares I means $16 billion more for Ares V
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