Columbia subject headings:
Americans--Crimes against.
Cruise lines--Security measures.
Cruise ships--Security measures.
Territorial waters--United States.
Harvard subject headings:
Americans--Crimes against.
Cruise lines--Security measures.
Cruise ships--Security measures.
Territorial waters--United States.
Princeton subject headings:
Americans--Crimes against.
Cruise lines--Security measures.
Cruise ships--Security measures.
Territorial waters--United States.