As part of the US government shut down, many .gov sites have also shut down, replaced by messages like this:
“Due to the lapse in federal government funding, this website is not available. We sincerely regret this inconvenience.”
But one day, the government will start up again and government agencies will once again focus on ensuring that the information their sites provide is easily available to US citizens.
Read more: http://searchengineland.com/what-the-government-shutdown-means-for-gov-seo-173337