Yes but never on a long term, possible permanent basis.
The permanent part is only important so that we can have a specially trained unit for terrorist attack aftermaths, it doesn’t mean that they will be any more lethal to civilians than the 82nd would be, or has been in the past.
Moving into a community that has been attacked by Nuclear, Biological, or Chemical attacks, and that has lost the police and firemen and their hospitals takes unique training and specialization.
Having a unit assigned to establish a training standard and an SOP, and developing the special equipment list for those type of operations is a necessity.