@m >Permissions? I thought this was supposed to be free software.
Yes, because of the government, the license has to give permissions to exercise the four essential freedoms, as by default they're not granted.

The many BSD licenses are less free as they imply that acceptance is required merely to run the software, miss handling the many, many problems that face software and also do nothing to prevent the software from becoming proprietary, so in practice most users of software released under a BSD license is in the form of proprietary malware, which is the exact opposite of freedom.