So, apparently in 2001 a class action lawsuit accused the Department of the Interior of mismanaging Indian trust accounts. As part of that lawsuit court appointed hackers broke into DOI computers. The judge ordered all DOI computers to be disconnected from the internet. Some parts of the DOI came back online quickly, but others remained disconnected for over 6 years. Employee desktops couldn't even access the internet, so they could only send emails within their intranet.
Google the Cobell v. Norton lawsuit. It basically is a case study in how not to do internet anything along with some interesting physical site security problems.
