Always Check Your NumbersThis
article is good overall, but you gotta wonder about the opening sentence:
For more than four years - steadily, seriously, and with the unsentimental rigor for which we love them - civil engineers have been studying the destruction of the World Trade Center towers, sifting the tragedy for its lessons.Uh, let's hope that they haven't been studying the destruction of the WTC for more than four years, since it only took place about three years and nine months ago.