I don't know the situation at Ground Zero at this time.
Are those POWERFUL twin spot lights still there?
Here's a link to a great photo of the lights. I liked them a lot!
http://www.luvscreations.com/america/WTC_Lights/wtclights.htm
Those are great. They should make that the memorial. Every evening, let the lights shine until the point where the first tower was hit. Then maybe turn one of them off at that point until the time that the second tower was hit.
Ground Zero background:
http://www.freerepublic.com/focus/news/1493116/posts?page=109#109