With regard to that question, there are of course obstacles to freedom of information, and one of the obstacles is something that hits every regime, which is to what extent the bureaucracy and the political class endorse FOI or attempt to resist it. This again comes down to the issue of leadership.
There are also problems with the mechanisms of how it works. For example, every system experiences delay, frustration, and slowness of response times. In terms of the three issues mentioned, these are all problematic areas. Of course national security does contain a specific exemption under every freedom of information act I know of, but there are often battles around that area for issues that might be on the cusp of national security.
In terms of copyright, I think John is far better placed than I to speak about it. I will just say that it remains an issue in the U.K. at several levels, about to what extent copyright covers these.
Finally, the division between openness and privacy is a very controversial and difficult area, and I think about a third of all the requests that go to the information commissioner to be looked at are actually around this area between where freedom of information ends and privacy begins. It was even a rather big issue as regards MPs' expenses in the U.K., about whether expenses were private data related to MPs or whether it was possible to open them up to the public.