Poking around on the net today, I ran across this page with a number of pictures of ICBM launch facilities. In one, you can see a cabinet labeled 'secure storage' with what appears to be a pair of Master 'sesamee' locks. This is probably miscategorized, but I though y'all might find it interesting to see what the US government considers/considered 'secure'.
http://cryptome.org/n1/n1-eyeball.htm
I suppose, that with the clearance needed to get that close to the cabinet, that those are probably adequate. Still......[/url]