Debian Security Updates

[Aurelio Turco <azt@bom.gov.au>]

Debian Weekly News of 2002JUL18,
recommended the following:

  deb http://security.debian.org/debian-security stable/updates
    main contrib non-free

  deb http://security.debian.org/debian-non-US   stable/non-US
    main contrib non-free

  deb http://security.debian.org                 stable/updates
    main contrib non-free

Is there really some difference between 1 and 3?

Please reply directly as I am currently not on the list.

Cheers.
Aurelio.