Let's play worst case scenario here...
Lets say that Spaceship Earth was hit by a plane.
First, there would only be about 500 people on the ride.
Second, almost half can get out.
Third, remeber, there are TWO exits to Epcot.
Unlike the WTC or the Pentagon, the parks are spread out and are thought out for possible attacks (that is why the major attractions are located across the park from each other rather than next to each other.) Even if a plane or a bomb went off, it would kill only one or two hundred. Plus, if Spaceship Earth colapsed, it wouldn't even bring harm to most of the park. It will only hurt some of Innoventons, The Living Seas, and the Universe of Energy. The only thing that the attack would bring would be the closeing of Future World, World Showcase would probably reopen in a few days.
Of course, this dosn't mean that someone can board a crop duster and drop anthrax or small pox on MGM or MK ether.
This is not to scare anyone. This was ment to point out that an attack on any amusement park would be ineffecient and stupid. The terrorists want to kill as many as quick as possible. It would take them a long time to kill a few people in an amusement park.
Thank you. Anybody else want to use my soap box?