A factory closed, and the money went elsewhere.
On 1 August 1968, before the first landing, NASA chose not to order more Saturn Vs. The production lines closed, the tooling was scrapped, and the workers moved on. [1]
Apollo 20 was cancelled in January 1970 and Apollo 18 and 19 that September. [1][2][4]
Pettit was making exactly this point: the Saturn V and its factories no longer exist, so the capability has to be rebuilt. He was arguing for going back to the Moon, not saying the first trips were faked. [3]
The design itself is no secret. On 25 April 2009 hobbyist Steve Eves flew a 1/10-scale Saturn V, the largest amateur rocket then launched and recovered, more than 4,440 feet up. [5]
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