[Dnssec-deployment] Who has built and maintains the longest trust chain?

[Edward Lewis]

Of all the chains of trust out there, does anyone know of a 
particularly long one?  I can find examples of root-tld-enterprise, 
but is there one deeper (test or production)?

Asking out of curiosity, desire for a real test case, and wanting a 
demonstrative example.
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Edward Lewis
NeuStar                    You can leave a voice message at +1-571-434-5468

Ever get the feeling that someday if you google for your own life story,
you'll find that someone has already written it and it's on sale at Amazon?