One of the important documents our government has produced for sounding the alarm for civil defense. This was a huge source for us to develop our philosophy on the need for civil defense. A simple, but powerful document.
Dhs Civil Defense HS
This is the Civil Defense and Homeland Security: A Short History of National Preparedness Efforts produced by DHS/FEMA. It is a quick look at civil defense and how it became FEMA. A good tool for understanding the history of civil defense and how we got to where we are today.