Write a research paper on us department of homeland security

The Zombie Apocalypse: U.S. Department of Homeland Security.
This paper it will be part of research, the research about the ZOMBIE

I want to write about U.S. Department of Homeland Security:

1-U.S. custom & Border Protection

2-U.S. Citizenship & Immigration Service

3-U.S. Coast Guard

You have to talk about this organization ( the objects ), goals and works and how they prevent this kind of accidents if its happen how they going to deal with this kind of accidents.

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