I have to agree with Jimbo Wales and Sandpiper: The current image and text might be misleading in suggesting a "collapse" of the building. The different angle of view makes the tower a weak reference, particularly as its base is obscured and the (corresponding) horizontal beams are not easy to visually align with the building. The following images , seem to be more revealing to me (though "13" is low resolution) and do appear to show top walls between the steel frame missing, but no collapse or height change of the structure itself when comparing to the neighbor building (presumably same height). Surely, there is an English source with better image quality to be found.  (79.240.212.8  )