Response to a large building collapse requires protection different than what emergency responders are typically provided. The hazards following the collapse of a large multi-story building are larger and more uncertain, and the duration of the response is much longer than usual.  -   Henry Willis     Quotes
Response to a large building collapse requires protection different than what emergency responders are typically provided. The hazards following the collapse of a large multi-story building are larger and more uncertain, and the duration of the response is much longer than usual. Henry Willis