while adding some software to my new Fedora installation:

[lewis@localhost ~]$ yum install openscad-MCAD
Loaded plugins: langpacks, refresh-packagekit
You need to be root to perform this command.
[lewis@localhost ~]$ sudo yum install openscad-MCAD

We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:

    #1) Respect the privacy of others.
    #2) Think before you type.
    #3) With great power comes great responsibility.

[sudo] password for lewis: