The original designer of the memorial, Michael Arad, had this image in his mind of all the names appearing undifferentiated, almost random, really a poetic reflection on top of the nature of a terrorism event itself, but it was a huge challenge for the families, for the foundation, certainly for the first responders, and there was a negotiation that went forth and a solution was found to actually create not an order in terms of chronology, or in terms of alphabetical, but through what's called meaningful adjacency.