I guess you were unaware of the fact that he worked in missile testing & development for years and years?
848 karma · joined March 20, 2012
I am not sure this is the convincing argument you think it is, however.
You can read it in a collection of his writings (https://archive.org/details/someremarksessay00step/page/120/...) but that's not much different (and less accessible) than the link on this post.
https://wamu.org/story/20/02/27/metro-just-received-the-last...
Numbers: https://en.wikipedia.org/wiki/Washington_Metro_rolling_stock