Top 5 Conspiracy Theories that Turned out to be True

We all know the old trope of the tinfoil hat wearing conspiracy theorist who believes crazy things like "the government is spying on us" and "the military is spraying things in the sky" and "the CIA ships in the drugs." Except those things aren't so crazy after all. Here are five examples of things that were once derided as zany conspiracy paranoia and are now accepted as mundane historical fact.