Travailing in Europe,notably Greece ,and Italy..and to include other places....they tend to preserve their symbols of history...notably their buildings of importance....Too numerous to mention here but a magnet for tourists to see for thousands of years now!....not criticizing America,for we do save historic sits,but not with that intensity!..even with Europe bombed into the stone age in WW2,they still retained their historical flaver..Often new construction simulating the old!!.Just this week,in Pompeii,an old structure there,collapsed...the out roar was substainsial......Weather it was Dearborn Michigan ,Grumman in NY,with those Plants,Or Boeing,or the Brooklyn Navy Yard,.So many!..more care should be given....But,We do have the knowledge,and the documents,and the photos of those places in those times...It will have to do!.....The Twin Towers ,are going thru a recapturing of their former glory,It will never be the same....but We know all about it,and it will not be forgotton...like Pearl Harbor,and the Almo!!...And thats good enough!!