The primary responsibilities of the Department of Homeland Security is to protect the United States against any form of threats be it in aviation, border control, cybersecurity, etc.
In my opinion, the agency’s organization and mission are not too broad because to be able to meet the different obligations to the American people, one has to widen their scope as threat can come from anywhere.
The primary role of the homeland security as a cabinet department of the United States federal government was to act by protecting the people of the United States of America and all of its territories from any form of terrorist attacks and others.
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