the REAL thing - again
In front of the building you have the traffic and underneath the buildings you have the rats and the subway and above the building you have the sky with disoriented geese which got stuck in the magnetic field of Lower Manhattan and are circling forever above Ground Zero, like a landmark and reminder to the well-known, much-talked-about event one day in 2001, but behind the buildings, behind them, you see the REAL thing.
Only the geese can see it, but their sense of orientation has failed them.