Today is the twelfth anniversary of the 9/11 attacks. I don’t think anyone who lived through that day at an age old enough to understand what was happening is likely to ever forget it. I doubt I can say anything about that event which has not already been better said by others. But, for what it is worth, I briefly recounted my own experience of 9/11 here. It isn’t particularly profound or moving, but does give a small example of how knowledge of history and social science can sometimes mislead rather than inform.