Accidents... Explosions... Terrorism... The end of the world... We live in the shadow of these notions every day. Even when we try to push them away or ignore them, all we do is bury them deep in our subconscious mind, from where they will still be looking for a way to erupt to the surface. Sometimes they come to haunt us in our dreams. 

However, our buried fears are not the only explanation for catastrophic dreams. Things go much deeper than that. There is evidence on the Internet that many people had dreams and visions preceding the twin towers attack on 9/11. In their case, dreams were more than a freudian outlet for repressed emotions. Like the old prophecies, they carried a secret message that tried to make itself known... a dark glimpse into the future... 

I had a dream myself exactly one month before the attack (August 11). According to my diary, I saw a plane crashing far away in the distance and I had the feeling I was the witness of a huge catastrophe. I didn't see the twin towers, as they were beyond my visual field, but I could see the huge explosion left behind. You can imagine my surprise when I came back to that passage months after the day of the tragedy.