Totally in keeping with the shallow society involved in commemorating the event. Gettysburg is space set-aside for remembrance, as is the site of the Arizona. You canNOT have a memorial 'integrated' with a workspace. The day-to-day workspace will easily overwhelm the memorial.
My idea was several locations in the area: closed structures containing full-sphere panoramic images from those locations of before and after - to help instill the sense of destruction and devastation, and insult ,to the Country.
Manhattan is a tiny island. There are plenty of commercial spots on Manhattan where traic/historical events occured.