Memorial
One thing I do not agree with, and that is the wish of some relatives of victims to make the whole site a memorial. There have been many places where devastation has killed many people as a result of war, disaster, or something else. Almost never have these places been left entirely fallow.
There is a monument in Hiroshima to remember the atomic attack. But it would have been ghastly to leave the entire city as a blasted plain instead of rebuilding it to the thriving city it is today.