Well, one would think that the most important conspiracy theory today is the 9/11 domestic attacks theory. I'd really advise anyone here looking it up, if you haven't yet heard about it. I'm sorry to talk about it here, it's a bit offtopic in this board but I think every intelligent person should make it's mind about this one.
The fact is that a lot of intelligent and reputable people have many doubts about too many aspects of all that happened on September 11, and the incompetent White House administration has never proved that their conspiracy theory (bin laden, bla bla bla) is the true one. When I come to think of it, many things in the world are conspiracy theories, but some of them are mainstream (have been inculcated in the minds of people)...
Some of the weirdest things for me are:
1- The collapse of all of the wtc buildings. Especially the case of the third building - wtc 7 - which fell despite the fires which consumed it being puny compared to many fires which happened on many other historic skyscrapers, which didn't even threaten to fall. If you see the videos, it seems a clean and perfectly engineered demolition, without any side damage at all... Not to talk about the fact that WTC's director inadvertently revealed that it was indeed demolished, only to be contradicted by other official sources later.
2- The pentagon - compare the explosion which happened there with the explosions seen at the WTC. Even more interesting is the fact that a rookie pilot (as claimed by his flight instructors) supposedly managed to maneuver a plane as only the best military pilots would be able to. Flying a plane a few feet above the ground at a speed much higher than standard landing speed? Sounds too weird to me...
3- The fact that there were supposedly calls made from cellphones in planes when the planes were at 35000 feet. Many experiments have proved that this is impossible...
Knowing the particular nature of this forum, some people will possibly try to debate some of these issues.
Some links:
http://911research.wtc7.net/
http://en.wikipedia.org/wiki/9/11_do...spiracy_theory
Videos of talks about this subject (very interesting indeed) -
http://www.911busters.com/
DISCLAIMER - I'm not interested in conspiracy theories for their own sake, I'm just another guy after the truth...