It’s hard to resist the value of a good symbolic pun, and once the dust settled around the ruins of the World Trade Center I found it impossible to resist a small flash of admiration for the marketing genius displayed by Osama bin Laden & Co. Successful terrorism is predicated on memetic value, and you can’t buy better memetics than precipitating a national emergency on 911, given that it’s also the number that Americans dial when they need emergency services.