I sit here in the Cassandra suite, watching the tech community finally waking up to the reality of the world. You are starting to panic because you know none of the operating system choices you have are viable for truly secure systems. Soon you will learn about Multi-Level Secure systems, Capabilities, and other features of the secure computing..
About 10 years from now, you'll get the hints the universe has dropped on you, and start implementing these systems.
About 10 years after that, some real old timers (or young punks who've read history) will point out that this stuff was actually figured out in the late 1960s, and early 1970s.