9-11 Memorial: What's the Point?

Here's a non-rhetorical question: what is the point of Mayor Bloomberg's 9-11 memorial?

Clergy are excluded, so it's not about praying for the dead and their families.
First responders are excluded, so it's not about honoring their courage and sacrifice so as to encourage those traits.
Secular memorial services are usually a celebration of the life that's past, with friends and family exchanging funny or poignant memories. There are far too many deceased and no one knows them intimately enough for that.

So what exactly is this event going to be? A celebration of victimhood? If there's another answer, please suggest it.