In 1986, as a State Department bureaucrat with pull, he came up with a plan to battle terrorism and subvert Muammar Qaddafi by having SR-71s produce sonic booms over Libya. This was to be accompanied by rafts washing onto the sands of Tripoli, the aim of which was to create the illusion of a coming attack. When this nonsense was revealed, it created embarrassment for the Reagan administration and was buried.
http://www.securityfocus.com/columnists/143Clarke was too damned dumb to know that businesses don't run critical systems on the Internet, they run on secure networks. Apparently he knows as much about cyberspace as he does about nerve gas.