Columbia subject headings:
Drug traffic--United States--Prevention.
Merchant mariners--Licenses--United States.
National security--United States.
Shipping--Security measures--United States.
United States. Coast Guard--Appropriations and expenditures.
Harvard subject headings:
Drug traffic--United States--Prevention.
Merchant mariners--Licenses--United States.
National security--United States
Shipping--Security measures--United States
United States. Coast Guard--Appropriations and expenditures.
Princeton subject headings:
Drug traffic--United States--Prevention.
Merchant mariners--Licenses--United States.
National security--United States.
Shipping--Security measures--United States.
United States. Coast Guard--Appropriations and expenditures.