War on terrorism, 2001- Security, International 5 Foreign relations -- 3 Terrorism 3 Globalization 2 Political violence 2 September 11 Terrorist Attacks, 2001 2 more ... Terrorism -- 2 World politics -- 2 Homeland security 1 Infrastructure -- 1 International relations 1 Iraq War, 2003- 1 Military policy 1 National security 1 National security -- 1 Nuclear nonproliferation 1 Political stability 1 Politics and government -- 1 Prevention 1 Safety measures 1 Security Management 1 Security measures 1 Transportation -- 1 Unilateral acts (International law) 1 United States 1 Weapons of mass destruction 1 less ...