What's the "lesson" of 9/11?

Photo credit: PAUL J. RICHARDS/AFP/Getty Images

Every year, I hear, especially since the 10th anniversary, “Remember 9/11! Never forget!” If we somehow forgot, we’d cease to be ‘vigilant’. I remember September 11, 2001 amazingly well, thank you. Just this summer, I was at highway rest stop on I-87, the Northway, not far from Albany, when I saw a memorial for three people who worked for the Department of Transportation, one of whom I knew not very well, who died on that day.

Even my daughter, who wasn’t even born then, knows about 9/11.