We keep making the same mistakes twice (three times in the case of the USS Greenville, what's up with that boat?). We learn to work harder at screening folks who get on aircraft after we lose 3-thousand lives in NYC, PA and the Pentagon. We learn to protect our warships at dock after a dingy blows up the USS Cole. And we guess we'll learn to protect our nuclear submarines at Point Loma after an illegal blows the sucker to smithereens. HELP!!