Challenger Space Shuttle Disaster (1986)
Cultural Revolution Turmoil (1966-1976)
Norilsk Oil Spill (2020)
Alberta Wildfires (2016)
Brumadinho Dam Collapse (2019)
Adelaide Hills Bushfires (2015)
Kumbh Mela Stampede (2013)
Plaza de Mayo Massacre (1955)
Charyn Canyon Flooding
Tamanrasset Floods (2020)