9/11 Families Appeal Ruling; Is Vaporization and/or Radioactivity the Reason for that Ruling?

17 family members of 9/11 victims have filed an appeal against a court decision to keep victims remains underground.

http://www.cnn.com/2012/08/19/us/new-york-9-11-families/index.html?hpt=hp_t2

“The appeal comes in a New York court decision of a lawsuit brought after the 9/11 Memorial Museum decided to keep the unidentified remains of ground zero victims underground near the museum. According to the 9/11 Memorial’s website, the repository will be located between the footprints of the two towers and will be accessed, operated, and maintained solely by the city’s office of the chief medical examiner.”

So I ask is the reason for the regime to want to keep the remains undergorund and under lock and key, because they are either radioactive or show signs of vaporization–from the nukes used to kill them?