Schneier links to a Wikipedia article about Sensitive Compartmented Information Facilities (SCIFs) and explains that he wanted to speak to the members of Congress in such a facility, but could not do so because he is denied access to such facilities as someone without the appropriate security clearances. And that puzzled me, and prompted me to read the Wikipedia article after reading Schneier's blog post submitted here, because I had been told years ago, when I definitely did not have the appropriate level of clearance for a SCIF (as I have never had and probably never will have) that I did have access to a special hearing room for one of the congressional intelligence oversight committees. I was inside the room at the time, with foreign visitors. (I was there as the interpreter for the foreign visitors.) I saw the hearing room back in the 1980s, as I recall, as part of a people-to-people program funded by the United States government that brought over people from other countries to look at how society works in the United States. The look inside the secure room was part of learning about how intelligence agencies in the United States are overseen by Congress. It was represented to us that when the room in the Capitol was closed up, it was impervious to any then-known form of surveillance. So now what Schneier says has me puzzled about whether or not there is any level of secure room between what he calls a "regular room" and a room that a United States citizen can only enter with a very high level of security clearance. It seems to me that there ought to be some kind of in-between room like that, precisely for meetings like the one Schneier just had. That would be better for effective congressional oversight, I think.