How Donald Trump has used conspiracy theories to further his bid for the presidency.
The search for the truth about who shot Malaysian Airlines flight MH17.
A decade on, why do some people still question what really happened on 9/11?
Examining what has happened to the world's most wanted man, Osama Bin Laden.
A look at the mystery of the 7/7 bombings and the conspiracies surrounding them.
A look at the mystery of 9/11 - a third tower at the World Trade Centre which collapsed.
Investigating the terror attack on Pan Am flight 103 at Lockerbie in 1988.
Series about conspiracy theories that have entered the mainstream
Series 1 homepage