Emergency management -- Prevention -- 2 Biological warfare 1 Biological weapons 1 Bioterrorism -- 1 Civil defense -- 1 Crisis management 1 more ... Crisis management -- 1 Defenses 1 Emergency management 1 Government policy -- 1 History -- 1 National security -- 1 Public health -- 1 Terrorism -- 1 Tohoku Earthquake and Tsunami, Japan, 2011 1 less ...