Challenger Space Shuttle Disaster (1986)
Tangshan Earthquake (1976)
Vladimir Lenin's Death and Aftermath (1924)
Westray Mine Disaster (1992)
2014 FIFA World Cup Violence
Port Arthur Massacre (1996)
Kumbh Mela Stampede (2013)
Plaza de Mayo Massacre (1955)
Zhanaozen Massacre (2011)
Oil Rig Explosions and Fires