"National security." . . "Terrorismus Prävention USA." . . "Innere Sicherheit USA." . . . . "Electronic books"@en . . . . . . . . . "The Department of Homeland Security" . "The Department of Homeland Security"@en . . . . . . . . . . . "Juvenile works"@en . "Juvenile works" . . . . "Discusses the history of the Department of Homeland Security, who is in charge, what it does, and how it affects Americans today."@en . . "Discusses the history of the Department of Homeland Security, who is in charge, what it does, and how it affects Americans today." . . . . . "Civil defense." . . . . "Terrorism." . . "Staatsschutz USA." . .