1980 Eruption of Mount St. Helens
1985-current Eruption of Mt. Kilauea
2001 Terrorist Attacks on the United States
2001-2014 War in Afghanistan
2004 Earthquake and Tsunami in the Indian Ocean
2005 Hurricane Katrina
2008 Sri Lanka Cyclone Nargis
2010 Earthquake in Haiti
2010 Chilean Mining Accident
2011 Earthquake and Tsunami in Japan
2011 Tornado in Joplin, Missouri
2013 Boston Marathon Bombing
2013 California Wildfire
2014 Ebola Outbreak in West Africa
2014-2015 Measles Outbreak in the United States
1985-current Eruption of Mt. Kilauea
2001 Terrorist Attacks on the United States
2001-2014 War in Afghanistan
2004 Earthquake and Tsunami in the Indian Ocean
2005 Hurricane Katrina
2008 Sri Lanka Cyclone Nargis
2010 Earthquake in Haiti
2010 Chilean Mining Accident
2011 Earthquake and Tsunami in Japan
2011 Tornado in Joplin, Missouri
2013 Boston Marathon Bombing
2013 California Wildfire
2014 Ebola Outbreak in West Africa
2014-2015 Measles Outbreak in the United States