Homeland security : an introduction /
Givens, Austen D.,1982-author.
Busch, Nathan E.,1971-author.
Bersin, Alan Douglas,1946-author.
Includes bibliographical references and index.
United States. Department of Homeland Security.
United States. Department of Homeland Security.
Terrorism
National security
Internal security
Internal security.
National security.
Terrorism
Homeland security