It is really good news that free software is used in CERN for the Large Hadron Collider, however, when trying to access anything to do with https://www.scientificlinux.org/ using Firefox 3.0.1, all I see is:
Secure Connection Failed
www.scientificlinux.org uses an invalid security certificate.
The certificate is not trusted because the issuer certificate is unknown.
(Error code: sec_error_unknown_issuer)
Which looks like a bad advertisement for the free software community!