Well lets see someone obviously knows how to build a nuclear bomb. And someone has figured out how to hijack an aircraft. So the rest of us will remain blissfully ignorant of how that is done; so the people who can build bombs and hijack airplanes won't have to worry about us stopping them. Great logic.
"What we have is a failure of imagination." (Col. Frank Borman) The only way you can prevent anything is to fully understand how it is accomblished.

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"The future is here. It's just not evenly distributed.