"Understanding the Department of Homeland Security discusses why the Department of Homeland Security (DHS)--the largest and the newest department of government--was established and then takes a detailed look at the role of the 22 different federal departments and agencies that were incorporated into it. DHS has more than 240,000 employees in jobs that range from aviation and border security to emergency response, from cybersecurity analyst to chemical facility inspector. Its duties are wide-ranging, but the goal is clear--keeping America safe. Features: An analytical look at the Department of Homeland Security and all its component agencies. A list of all the major homeland security incidents over the last 100 years. About the Series: The Cabinet Series looks at the major departments in the Federal Government explaining why they were created and the responsibilities of each agency and how they conduct their daily business at home and abroad. It helps to explain what federal agencies do and how they affect the lives of citizens."--From back cover.