Columbia subject headings:
Electric power systems--Natural disaster effects--United States.
Electric power systems--Security measures--United States.
Electric utilities--Security measures--United States.
Electrical engineering--Safety measures.
Sabotage in the workplace--United States.
Terrorism--United States.
Harvard subject headings:
Electric power systems--Natural disaster effects--United States.
Electric power systems--Security measures--United States.
Electric utilities--Security measures--United States.
Electric utilities--United States.
Sabotage in the workplace--United States.
Sabotage in the workplace.
Terrorism--United States
Princeton subject headings: