Columbia subject headings:
Emergency management--United States--Finance.
National security--United States--Finance.
Terrorism--United States--Prevention--Data processing--Finance.
United States. Dept. of Homeland Security--Appropriations and expenditures.
Harvard subject headings:
Emergency management--United States--Finance.
National security--United States--Finance
Terrorism--United States--Prevention--Data processing--Finance.
United States. Department of Homeland Security--Appropriations and expenditures.
Princeton subject headings: