Censorship from the Library of Congress?

I was reading on Librarian in Black that the Library of Congress blocked access to Wikileaks on all of its computers.  The Library of Congress' official statement is “The Library decided to block Wikileaks because applicable law obligates federal agencies to protect classified information.  Unauthorized disclosures of classified documents do not alter the documents’ classified status or automatically result in declassification of the documents.”  But the New York Times claims there was no order to block the web site on government computers.  Hmmm.  Library of Congress, this sounds a awful lot like censorship...doesn't it?  Thoughts?