Prevention Terrorism -- Prevention. -- 2 Security measures 2 Security measures -- 2 War on Terrorism, 2001-2009 2 Aeronautics, Commercial -- 1 more ... Airports -- 1 Civil defense 1 Civil defense -- 1 Counterinsurgency -- 1 Defenses 1 Finance 1 Finance -- 1 Finance. -- 1 Harbors -- 1 Hate crime investigation 1 Hate crime investigation -- 1 Hijacking of aircraft -- 1 Merchant marine -- 1 National security 1 National security -- 1 Passenger traffic 1 Politics and government -- 1 Prevention -- 1 Special forces (Military science) -- 1 Terrorism 1 less ...