THAT should be the memorial.
I actually think all of this huge effort...millions in man-hours to build the right memorial...the various fights and legal battles yet to come....ought to be settled here and now. No memorial...except the dang 9/11 cross. Don't even paint the thing. Don't plant flowers around it. Nothing. Thats WTC steel...and it ought to stay there until NYC is covered with a 1,000 ft glacier and Xenu returns with the space aliens to reclaim Brooklyn as the sacred shore (well...or until Knicks win the championship again).