World Trade Center / Firefighter's Memorial
I've seen the Firefighter's Memorial three times now. It's on the side of the Engine Co. 10/Ladder Company 10 firehouse on the corner of Liberty and Greenwich Streets.
The bronze images are not of supermen. They're firemen doing their jobs. Here in one of my favorite images, of an exhausted fireman washing his face, from an open fire hydrant.
The second plane hits Two World Trade Center.
The lower part of the memorial is of marble. It contains the names of the firemen who died.
See the very good NY Times article ( Click on the "interactive feature" to the left )
Also, beautiful nighttime photos from Test of Will. Like the man says, click 'em to make 'em bigger. There are other good photos on that site, and I may link to it.