American Red Cross Guide to Preparing for Emergencies 

American Red Cross Guide: Terrorism, Preparing for the Unexpected 

Centers for Disease Control & Prevention 

Federal Emergency Management Agency (FEMA) 

Homeland Security Emergency Management Agency (Washington DC) 

Ready.gov 

Ready.gov Tornadoes 

U.S. Geological Survey 

U.S. Department of State

The Lessons of 1989: Freedom and Our Future