Emergency management -- Terrorism -- 5 Prevention -- 3 Civil defense -- 2 National security -- 2 Citizen participation -- 1 Defenses 1 more ... Disaster relief -- 1 Emergency communication system -- 1 Handbooks, manuals, etc 1 International cooperation 1 Natural disasters -- 1 Prevention. -- 1 Safety measures 1 Self-defense -- 1 Survival skills -- 1 Tohoku Earthquake and Tsunami, Japan, 2011 1 Weapons of mass destruction 1 Weapons of mass destruction -- 1 Wilderness survival -- 1 less ...