On October 4, 1992, a 747 cargo plane of Elal crashes into an apartment house in Bijlmermeer near Amsterdam killing 43 people including the 3 man crew caused by losing two engines due to metal fatigue in the engine suspension.
An investigation inti the cause of the sinking of Titanic. The ultimate cause was the use of post-war rivets that showed flaws in the metal and were unable to withstand the massive strain of the collision with the iceberg.
An accidental release of an old missile on the flight deck of the USS Forestal starts a huge fire and subsequent explosions kill a total of 134 soldiers and injure another 161. The accident came close to sinking the Forestal.
A large department store collapses in Seoul, South Korea killing 502 people and injuring another 937. Safety margins were ignored during construction and several people were jailed for corruption and criminal negligence.
In December 2004 the subduction fault between the Indian and Burma tectonic plates ruptured along 1600 km causing a 9.1 - 9,3 magnitude earthquake and a giant Tsunami that killed around 230'000 people.
On May 25, 1979, an American Airlines DC-10 loses an engine at take-off and crashes into a trailer park killing all 271 on board. The investigation shows that short-cuts at maintenance resulted in damaged attachments of the engine pylon.
On March 23, 2005 restarting a distillation tower results in a massive explosion, destroying large parts of the Texas City refinery. The cause is relayed to short-cuts in safety procedures and generally a poor safety record over many years.
In 1974, 148 tornadoes hit 13 states causing millions of Dollars of damage injuring 5500 people and killing 330. At the time the weather service couldn't give precise warnings where the tornadoes would strike.
On January 28, 1986, Challenger exploded 73 seconds after lift-off. The official report named failing O-rings in the booster rockets as the cause of the disaster, but bad communication and decision procedures also played a role.