The Bard tells us, rightly, that the past is prologue. But until America's greatest military intelligence success -- and failure -- becomes common knowledge Americans will remain intellectual sitting ducks, herded hither and yon, hoping to build a sheltering future on shaky misinformation. I'm talking about the Venona Code intercepts: The 3000 encrypted communications between Soviet spies operating in this country and their masters in Moscow, which American and British code breakers began deciphering in 1946. These KGB messages revealed that the Soviets had agents at the highest levels of the executive and legislative branches of our government -- and...