Who first said,"It ain't rocket science."?

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Request for Question Clarification by tutuzdad-ga on 13 Sep 2006 06:15 PDT

?The term 'rocket science', in its original context, was coined by
Alfred J Zaehringer, an expert in the field. Mr Zaehringer was one of
the significant players in the early days of modern rocketry and has
kept pace with scientific progress in the decades since.?
AMAZON.COM
http://www.amazon.co.uk/Rocket-Science-Second-Millennium/dp/1894959094

From this came the common vernacular phrase ?It isn?t (?It ain?t??,
?It is not??, etc.) rocket science? to describe a process that
requires little scientific reasoning to carry out. Common phrases like
this often simply ?evolve? and become part of the current lexicon and
therefore cannot be attributed to anyone in particular.

Please let me know if this suffices as a suitable answer in lieu of
better supporting evidence; which I am confident does not exist.

Regards;
Tutuzdad-ga

I did.
While I'm here ... what's the total number of dead people? Is there a
mathematical model for this?
Kind regards,