Browse Conspiracy Theories

The October 1, 2017 mass shooting at the Route 91 Harvest country music festival in Las Vegas, which killed 60 and wounded over 400 — the deadliest mass shooting in modern US history. Various conspiracy theories claim multiple shooters, ISIS involvement, MGM/security cover-up, or government-directed false-flag operations.

The April 20, 2010 Deepwater Horizon oil rig explosion in the Gulf of Mexico killed 11 workers and released ~4.9M barrels of oil — the largest marine oil spill in history. BP, Transocean, and Halliburton's cost-cutting and safety failures are documented; allegations of regulatory capture and concealment of spill volume are partly supported.

The documented failure and subsequent cover-up of the police response to the May 24, 2022 mass shooting at Robb Elementary School in Uvalde, Texas, where 19 children and 2 teachers were killed. Officers waited in the hallway for 77 minutes while the shooter remained in a classroom with surviving children and their mothers pleading outside.

Condensation trails (contrails) are the normal ice crystal trails formed behind aircraft at high altitude when hot, humid engine exhaust meets cold air. Distinct from the "chemtrail" conspiracy theory, which claims these trails contain deliberate chemical spraying programs.

The Milwaukee Police Department's May 27, 1991 return of 14-year-old Konerak Sinthasomphone (fleeing from Jeffrey Dahmer's apartment) back to Dahmer, despite bystander objections. The victim was killed that night. This incident and broader investigative failures are well-documented; claims of intentional protection remain contested.

The July 20, 1993 death of Deputy White House Counsel Vincent Foster in Fort Marcy Park, Virginia, officially ruled suicide by five separate investigations. Conspiracy claims allege murder by the Clintons or a cover-up of connections to Whitewater or Hillary Clinton.

The long-documented relationship between Panamanian dictator Manuel Noriega and the US Central Intelligence Agency, including his role as a paid CIA asset (1967-1988) while simultaneously trafficking cocaine, running intelligence operations, and aiding US anti-communist operations in Latin America.

The Bush administration's 2002-2003 claim that Saddam Hussein's Iraq had operational ties to al-Qaeda, used as a central justification for the 2003 US invasion. The 9/11 Commission, Senate Intelligence Committee reports, and a 2006 Pentagon IG report all concluded no such operational relationship existed.

The concealment by Boeing of the Maneuvering Characteristics Augmentation System (MCAS) from pilots and regulators, which caused two fatal crashes — Lion Air 610 (October 2018, 189 killed) and Ethiopian Airlines 302 (March 2019, 157 killed) — and led to a 20-month global grounding.

The July 16, 1999 crash of a small aircraft off Martha's Vineyard piloted by John F. Kennedy Jr., killing him, his wife Carolyn Bessette, and sister-in-law Lauren Bessette. Conspiracy claims allege assassination by the Clintons, a senior Kennedy family cabal, or staged disappearance — the latter a QAnon staple.

The 1943 FBI seizure of Nikola Tesla's papers and belongings from his New York hotel room within hours of his death. The seizure is well-documented; what was taken, what was sensitive, and whether technology was subsequently suppressed remains partly contested.

The false claim that the April 15, 2013 Boston Marathon bombing was staged by the US government or involved "crisis actors" rather than being conducted by the Tsarnaev brothers. The real bombing killed 3 people and injured 260+.

The cluster of unexplained chronic symptoms affecting ~25-32% of 1990-91 Gulf War veterans, and the decades-long VA resistance to acknowledging it as a distinct service-connected condition.

The US military's use of Agent Orange herbicide in Vietnam (1961-1971) and the decades-long effort by the VA and chemical manufacturers to deny connections to veteran illnesses — cancers, type 2 diabetes, Parkinson's, peripheral neuropathy.

The December 21, 1988 bombing of Pan American World Airways Flight 103 over Lockerbie, Scotland, killing 270 people. Attribution to Libyan intelligence officer Abdelbaset al-Megrahi via 2001 conviction; sub-dispute over whether Megrahi was the primary perpetrator or a scapegoat for a broader Libyan or Iranian operation.

The October 2, 2018 assassination of Washington Post journalist Jamal Khashoggi inside the Saudi consulate in Istanbul, Turkey. The US Intelligence Community's February 2021 declassified assessment concluded Crown Prince Mohammed bin Salman approved the operation.

The 2014-2019 lead contamination of Flint, Michigan's drinking water following a cost-saving switch from Detroit water supply to the Flint River, and the systematic suppression of evidence by state officials.

The false claim, most prominently promoted by Alex Jones and Infowars, that the December 14, 2012 Sandy Hook Elementary School shooting in Newtown, Connecticut was staged by "crisis actors" to justify gun control legislation. The shooting killed 20 first-graders and 6 adults.

Claims that Freemasonry — a 300-year-old fraternal organization — exercises secret control over governments, the Catholic Church, and world finance through esoteric initiation rituals and networks.

A secret senior society at Yale University, founded 1832. Claims of Bush-family/CIA pipelines, elite control of US foreign policy, and occult initiation rituals are partially supported by documented facts and partially fabricated.

The claim, based on a 1984 packet of allegedly leaked documents, that President Truman in 1947 established a secret committee (Majestic 12 or MJ-12) of 12 scientists and military officers to study recovered UFO craft from Roswell.

A satirical movement launched in 2017 by Peter McIndoe claiming that all birds in the United States were exterminated by the CIA between 1959-2001 and replaced with surveillance drones. Designed as parody, it was widely shared without the satire being recognized.

The claim that Earth is hollow, with inner surfaces, inhabitants, or openings at the poles. Versions include the 17th-century scientific proposal by Edmond Halley, 19th-century Symmes Hole theory, and 20th-century Nazi/UFO-adjacent versions.