Eh... http://mako.cc/copyrighteous/when-free-software-isnt-better-talk
As for the speculation about the NSA making SELinux libre because of open source arguments (which, I stress, are rather unfounded)... well, it seems likely to basically be the case. But note also that SELinux is tied to Linux Security Modules, which (like most of Linux) is under the GNU GPL. The NSA was probably required to make SELinux libre if they were to release it at all.
