What is emergency management, how did it develop, and how is it different from civil defense?

What is emergency management, how did it develop, and how is it different from civil defense? Please cite or reference the textbook:
Introduction to Homeland Security: Policy, Organization, and Administration
Willard M. Oliver, Nancy E. Marion, Joshua B. Hill, 2015
Jones and Bartlett
ISBN.13: 978-1-284-04583-3 Writing assignments are judged on the quality of the response in regard to the question. Word count is NOT one of the criteria that is used in assigning points to writing assignments. However, students who are successful in earning the maximum number of points tend to submit writing assignments that fall in the following ranges:•Undergraduate courses: 400 words per question.

Citation StylesThe majority of your response should be your own original writing based on what you have learned from the textbook. However, students may also use outside materials if applicable. Be sure to provide a citation and a reference for any materials used, including the required textbook. The following points are designed to help you understand how to provide proper citations and references for your work:•Sources are listed in two places.•The first, a citation, is briefly listed within your answer. Thisincludes identifying information that directs the reader to your list of references at the end of your writing assignment.•The second, a reference, is at the end of your work in the list of references section.•All sources cited should follow APA style and provide enough identifying information so that the reader can access the original material SAMPLE ANSWER Starting during World War II, numerous federal government organizations were created to handledisasters and civil defense. Each time there was a new President, one of these organizations would change and it seemed like another was added. Until 1977, when President Jimmy Carter, in an effort to reduce government waste, created the Federal Emergency Management Agency (FEMA) as the lead agency for coordinating disaster relief. This was the largest consolidation of civil defense efforts in U.S. history. (Oliver, Marion & Hill, 2015 p.8-12)FEMA’s original mission was to respond to natural disasters. However, when President Reagan took office, he made their mission dual-purpose, so all emergency management funds could be used for natural disasters or attacks on the homeland. FEMA created the Integrated Emergency Management System (IEMS), which used an incident command system to manage and coordinate responses between 27 federal agencies and the American Red Cross. In 1993, FEMA

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