The perfect is not the enemy of the good

I was just listening to a CFR Podcast on Preventing Nuclear Terrorism in which the speaker said that one of the problems with our current strategy is that it focuses on very expensive exhaustive test measures (100% inspection of all cargo ships), rather than smaller measures across a broader spectrum of vulnerabilities.  Isn’t it interesting that the meme “anything less than perfect is useless” affects military planning as well as business.