Following the terrorist attacks on New York City and Washington, D.C. in 2001, Former President George W. Bush announced a need to develop a national strategy for homeland security. At that time, there were at least 40 federal agencies with responsibilities for homeland security activities. The Homeland Security Act (2002) created the Department of Homeland Security which is the overall agency in charge of protecting the American homeland by providing a more unified homeland security structure. Homeland security involves citizens being prepared as well as ensuring that businesses are prepared and secure.
Recognizing terrorism agents (chemical, biological, radiological, nuclear and explosives) and preventing their use.