Grief has always been our most well-policed emotion. Mourning is painful, so we make it the stuff of pageantry --of muffled drums and riderless horses and black-draped catafalques. To suffer collectively is, if nothing else, to suffer prettily.
What's harder to know is, When is enough enough? A lot of Americans are quietly, and guiltily, asking themselves that question this week, as Sept. 11--the sixth Sept. 11 since 2001--once again approaches. A sixth anniversary is an awkward thing, without the raw feeling of a first or the numerical tidiness of a fifth or 10th. The families of the 2,973 people murdered that...