Need to Know E-mail

If i worked as a sysadmin at a .mil, i'd send out e-mail like this all the time.

From hostmast@ops2.nic.mil Thu Aug 23 12:34:35 2001
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F ...

You know all you need to know.

hostmaster@nic.mil
>>

> 
> hi,
> 
> i'm curious as to what some domains in the nipr.mil range are, namely
> 
> bu-wcs1-kelly.nipr.mil
> bu-wcs2-kelly.nipr.mil
> bu-wcs3-kelly.nipr.mil
> wcs1.norfolk.nipr.mil
> wcs2.norfolk.nipr.mil
> wcs3.norfolk.nipr.mil
> 
> which i see hit my website with greater frequency.  at first i thought
> these were robots b/c they always request the robots.txt file first, but
> based on other logs i'm betting it's a web proxy of some sort.  is that
> right?
> 
> thanks,
> 
> -f
> http://www.blackant.net/
> 
> 

As an aside, i recently read the following in a Scientific American article (Oct 2001, p. 45):

Meanwhile unclassified communications of the U.S. Armed Services go through NIPRNET (Non-Secure Internet Protocol Router Network), which uses public Internet communications.

This seems to indicate that the NIPR in nipr.mil stands for Non-Secure Internet Protocol Router. Puzzle solved?