Approximately 86,000 people died from flooding and another 145,000 died from subsequent diseases, a total of 231,000 deaths. The Hyatt Regency walkway collapse of 1981, where a suspended walkway in a hotel lobby in Kansas City, Missouri, collapsed completely, killing over 100 people on and below the structure. The Space Shuttle Challenger disaster of 1986, in which an O-ring of a rocket booster failed, causing the external fuel tank to break up and making the shuttle veer off course, subjecting it to aerodynamic forces beyond design tolerances; the entire crew and vehicle were lost. The nuclear reactor at the Chernobyl power plant, which exploded in 1986 causing the release of a substantial amount of radioactive materials. The collapse of the Warsaw radio mast of 1991, which had up to that point held the title of world's tallest structure. The Sampoong Department Store collapse of 1995, which happened due to structural weaknesses, killed 502 people and injured 937. The terrorist attacks and subsequent fire at the World Trade Center on September 11, 2001, weakened the floor joists to the point of catastrophic failure. The Space Shuttle Columbia disaster of 2003, where damage to a wing during launch resulted in total loss upon re-entry. The collapse of the multi-span I-35W Mississippi River bridge on August 1, 2007. The collapse of the Olivos-Tezonco Mexico City Metro overpass of 2021, which had structurally weakened over the years. See also Dragon King Theory List of bridge disasters Seismic performance Structural collapse Structural failure Resonance disaster Risks to civilization, humans and planet Earth References Building engineering Civil engineering Failure