What is the nature or purpose of homeland security?

Based on your readings thus far from the text and your own research, write an initial thread discussing:
What is the nature or purpose of homeland security?
What are the mission areas of homeland security?
What are the major disciplines involved in homeland security?
What role does emergency management play?
Should homeland security focus be on terrorism or on all hazards, which would include terrorism. Why?

Any sources cited must have been published within the last five years. Acceptable sources include the textbook, peer-reviewed journal articles, government sources, professional association websites, etc. Each original thread requires a minimum of one biblical reference/quote (which is not a part of the original source count).

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