Watch the video to get the full effect.
The blocks on the corners are reminiscent of the original twin towers. Inside, the Saints surrounding Christ are "in the air." While I have never seen such iconography in an Orthodox Church before, I think this is a reminder of how so many victims died that day - in the air.
I forget the names of the highrise at the ground zero area but one of them has a green dome (copper dome I think) that matches this round church design so it fits.