By now many people have seen the video of Rosie O'Donnell waxing philosophically about the collapse of World Trade Center Tower 7. Her statement that for "the first time in history, steel was melted by fire" is pretty funny to anyone who's had any education (or maybe they stopped teaching about how steel is made in high school). Popular Mechanics debunked all the 9-11 myths long ago and responds to Rosie's allegations.
It's amazing to me that 30% of Americans seem to share her views. Most reasonable people do not spend their time convinced that conspirators are contriving plots to manipulate the world, yet the number seems to be growing. I'm not sure if it's because our educational system is failing to properly educate people or people feel powerless and want to attribute anything bad to a plot by their "enemies". Maybe this is all about politics. Hatred for Bush seems to drive many to irrational beliefs.
Funny thing is people want to hear this to confirm their own irrational beliefs. Why else would papers like National Enquirer do so well and why else could Rosie command a $40 million contract?
Update: Looks like the sinking of the Titanic was a government conspiracy as well - thanks to Andrew for enlightening me!