This is the first time since 2001 that September 11 has fallen on a Tuesday.
Contrasting with that Tuesday, today's New York southside is a cold, wet place, with lines of mourners standing in the rain for their turn to drop flowers into a pool of water.
Ceremonies at "ground zero" probably won't be the same after this, for two reasons.
- Survivors and family members of those who didn't survive have been deciding more often to remember and mourn privately, or move on to another sort of remembrance.
- Construction at the site is changing the nature of ground zero. By this time next year, the new World Trade Center's general shape should be visible.
Let's not forget.