Challenger Space Shuttle Disaster (1986)
Tangshan Earthquake (1976)
Chernobyl Nuclear Disaster (1986)
Westray Mine Disaster (1992)
Vargas Tragedy Landslide (1955)
Great Barrier Reef Bleaching
Partition Violence (1947)
Plaza de Mayo Massacre (1955)
Semipalatinsk Nuclear Testing Impact
Algerian Civil War Casualties (1991-2002)