Columbia subject headings:
National security--Technological innovations--United States.
Technology assessment--United States.
Terrorism--Prevention--Research--United States.
United States. Dept. of Homeland Security--Information technology.
Harvard subject headings:
National security--Technological innovations--United States.
Technology assessment--United States.
Terrorism--Prevention--Research--United States.
United States. Department of Homeland Security--Information technology.
Princeton subject headings:
National security--Technological innovations--United States.
Technology assessment--United States.
Terrorism--Prevention--Research--United States.
United States. Department of Homeland Security--Information technology.