Here's pretty good evidence that the Snowden document that Q linked was taken down by the site administrators. When you request the Snowden document, the web server redirects your URL to localhost (aka, your own PC) When you request any other document, the website works fine. Either the site was hacked, or admins blacklisted the URL by redirecting it to localhost.
https://www.hsdl.org/ Front page works!
https://www.hsdl.org/?view&did=766468 Other documents work OK
https://www.hsdl.org/?view&did=797546 Snowden document tries to pretend that the website is down….