<a href="https:&#x2F;&#x2F;webcache.googleusercontent.com&#x2F;search?q=cache:wZ0CexrlrU0J:https:&#x2F;&#x2F;cryptome.org&#x2F;2014&#x2F;10&#x2F;cnssam-tempest-1-13.pdf+&amp;cd=14&amp;hl=en&amp;ct=clnk&amp;gl=us" rel="nofollow">https:&#x2F;&#x2F;webcache.googleusercontent.com&#x2F;search?q=cache:wZ0Cex...</a><p><a href="http:&#x2F;&#x2F;www.gocsc.com&#x2F;userfiles&#x2F;file&#x2F;ortronics&#x2F;whitepapergovtv5aug2011final.pdf" rel="nofollow">http:&#x2F;&#x2F;www.gocsc.com&#x2F;userfiles&#x2F;file&#x2F;ortronics&#x2F;whitepapergovt...</a><p><a href="https:&#x2F;&#x2F;security.stackexchange.com&#x2F;questions&#x2F;10447&#x2F;is-the-us-military-secret-network-siprnet-physically-or-cryptographicaly-separat" rel="nofollow">https:&#x2F;&#x2F;security.stackexchange.com&#x2F;questions&#x2F;10447&#x2F;is-the-us...</a><p>I&#x27;m honestly not familiar with these kinds of facilities, but with a potential &quot;Collateral Confidential&quot; type cable, one could imagine a gas-filled tube being a countermeasure of some sort.