128 sourced Articles, covering events from 1692 to 2021.
Showing 73-96 of 128, earliest first.
26 February 1972
Buffalo Creek coal-waste dam and downstream valley, United States
On 26 February 1972, a coal-waste impoundment failed above Buffalo Creek in Logan County after heavy rain. Water and slurry cascaded through two lower impoundments and became …
27 February–8 May 1973
Wounded Knee community occupation area, United States
On 27 February 1973, Oglala Lakota activists and members of the American Indian Movement occupied Wounded Knee, demanding investigation of tribal chairman Richard Wilson and renewed attention …
21 July–August 1976
Bellevue-Stratford Hotel convention site, United States
After an American Legion convention at Philadelphia's Bellevue-Stratford Hotel in July 1976, attendees developed severe pneumonia. The outbreak ultimately involved 182 recognized cases and 29 deaths. Months …
2 August 1978–1980
Love Canal containment area and former 99th Street School, United States
In the late 1970s, residents of Niagara Falls' Love Canal neighborhood discovered that homes and a school surrounded a former chemical landfill. Oily residues and odors appeared …
27 November 1978
San Francisco City Hall, United States
Former San Francisco supervisor Dan White entered City Hall on 27 November 1978 and shot Mayor George Moscone and Supervisor Harvey Milk in their offices. Moscone had …
28 March–2 April 1979
Three Mile Island Unit 2 reactor, United States
On 28 March 1979, equipment failure and operator misinterpretation at Three Mile Island Unit 2 caused loss of reactor coolant and a partial core meltdown. A relief …
18 May 1980
Mount St. Helens National Volcanic Monument, United States
At 8:32 a.m. on 18 May 1980, a magnitude 5.1 earthquake triggered the collapse of Mount St. Helens' bulging north flank. The largest recorded landslide in history …
21 November 1980
Former MGM Grand, now Horseshoe Las Vegas, United States
On 21 November 1980, an electrical ground fault ignited combustible material in a restaurant at the MGM Grand hotel and casino. Fire swept through the unsprinklered casino …
17 July 1981
Hyatt Regency Kansas City atrium, United States
During a crowded tea dance on 17 July 1981, suspended walkways inside the Hyatt Regency Kansas City atrium collapsed. The fourth-floor bridge fell onto the second-floor bridge …
29 September–October 1982
Chicago metropolitan poisoning and investigation area, United States
Beginning on 29 September 1982, seven people in the Chicago area died after taking Extra-Strength Tylenol capsules filled with cyanide. Investigators concluded that someone removed bottles from …
23 April–11 July 1985
Coca-Cola headquarters and national product launch, United States
On 23 April 1985, Coca-Cola replaced its century-old United States formula with a sweeter version marketed as New Coke. Blind taste tests had favored the new drink, …
13 May 1985
Osage Avenue MOVE bombing and fire area, United States
On 13 May 1985, Philadelphia police tried to evict and arrest members of MOVE from a fortified rowhouse on Osage Avenue. After gunfire, water, tear gas, and …
28 January 1986
Kennedy Space Center Launch Complex 39B, United States
Seventy-three seconds after liftoff on 28 January 1986, Space Shuttle Challenger broke apart, killing Francis Scobee, Michael Smith, Ronald McNair, Ellison Onizuka, Judith Resnik, Gregory Jarvis, and …
27 September 1986
Public Square balloon launch area, United States
On 27 September 1986, United Way of Cleveland released nearly 1.5 million helium balloons from Public Square in a fundraising spectacle intended to set a world record …
June–November 1988
Yellowstone National Park fire landscape, United States
During the exceptionally dry summer of 1988, multiple lightning- and human-caused fires burned across Yellowstone National Park and surrounding forests. Winds repeatedly drove rapid growth, and about …
24 March 1989
Bligh Reef grounding site and Prince William Sound spill area, United States
Just after midnight on 24 March 1989, the tanker Exxon Valdez struck Bligh Reef in Alaska's Prince William Sound and spilled about 11 million gallons of crude …
17 October 1989
Cypress Street Viaduct collapse zone and memorial park, United States
When the magnitude 6.9 Loma Prieta earthquake struck on 17 October 1989, a 0.7-mile section of Oakland's double-deck Cypress Street Viaduct collapsed. The upper roadway fell onto …
25 March 1990
Former Happy Land Social Club site, United States
Early on 25 March 1990, Julio González set gasoline on fire at the only public entrance to the unlicensed Happy Land Social Club in the Bronx after …
19–23 October 1991
Fire origin slope above 7151 Buckingham Boulevard, United States
A brush fire above Buckingham Boulevard was controlled on 19 October 1991, then escaped again the next morning under hot, dry Diablo winds. Flames and wind-borne embers …
29 April–4 May 1992
Florence and Normandie flashpoint within a citywide uprising, United States
On 29 April 1992, a Simi Valley jury acquitted four Los Angeles police officers of state charges in the videotaped beating of Rodney King. Anger erupted across …
21–31 August 1992
Ruby Ridge standoff area, United States
A fugitive arrest operation at Ruby Ridge, Idaho, became an eleven-day siege in August 1992. During an initial encounter, Deputy U.S. Marshal William Degan and fourteen-year-old Samuel …
28 February–19 April 1993
Mount Carmel Center siege site, United States
On 28 February 1993, the Bureau of Alcohol, Tobacco and Firearms attempted to serve search and arrest warrants at the Branch Davidian Mount Carmel Center near Waco. …
March–April 1993
Howard Avenue Water Purification Plant service area, United States
In spring 1993, the parasite Cryptosporidium passed through Milwaukee's southern water-treatment plant and caused the largest documented waterborne disease outbreak in United States history. An estimated 403,000 …
April–October 1993
Mississippi–Missouri river flood region, United States
Persistent rain from spring through summer 1993 saturated the upper Mississippi and Missouri basins, producing months of record or near-record flooding across nine states. Hundreds of levees …