1950- now, vaccines against rubella, mumps, TB, etc, contain thymerosal and mercury and other preservatives. Now the conspiracy lunatics say the vaccines were to kill babies that WWII did not kill.
Vaccines are blamed for autism.1990, the New Madrid (Missouri) fault mild earthquake, after it hit in 1812, US government was hiding that the USA was going to split in half by the new earthquake. No earthquake happened.
June 1994, Shoemaker-Levy comet crashed into Jupiter in several pieces. Conspiracy nuts said it was really NASA probes trying to ignite Jupiter.
It was pieces of a comet really. "Levy" was the proof that Jewish conspiracy was involved.
July 1995 Galileo probe was intentionally crashed into Jupiter, because the Shoemeaker-Levy space probes failed to ignite Jupiter. Conspiracy nuts said that the isotope based power generator was really to ignite Jupiter as a second sun, for various purposes. One of which, is to make Earth heat up and scare everyone with global warming.
Galileo was launchedc 5 years before the appearance of the Shoemaker-Levy comet.
It's impossible for humans to ignite Jupiter with any nuclear device or material
Year 2000, Y2K bug - conspiracy nuts and many yeshiva students said that January 1st 2000 all machines are going to go crazy due to refusal to fix the 2000 bug in computers. In reality, no computer malfunctioned, in Machon Meir or in any government.
2001, sept 11. "US government attacked the World Trade Center", in order to justify the war on terrorism, but really to spy on people of the world, and kidnap many people whose remains were never recovered.
2007, 2012, 2013, 2017 Nibiru scare - a planet-monster called Nibiru by Babylonians was going to collide with Earth on either of these years, and US Government was hiding it from the world, on order to capitalize on panic.
2013 (the idea invented for the Hollywood movie) the end of the world according to the Mayan calendar - the world was supposed to end, and the US Government was hiding it from the world. Hollywood made a movie about the event, which reinforced the conspiracy. Mayans and Infowars have been stupid all along.
Russia loves it though and lives in rewritten reality.