Scully: Why would somebody want to sabotage the Space Shuttle?
Mulder: Well, if you were a terrorist, there probably isn't a more potent symbol of American progress and prosperity. And if you're an opponent of big science, NASA itself represents a vast money trench that exists outside the crucible and debate of the democratic process. And of course there are those futurists who believe the Space Shuttle is a rusty old bucket that should be mothballed. A dinosaur spacecraft built in the 70's by scientists setting their sights on space in an ever declining scale.
Scully: And we thought we could rest easy with the fall of the Soviet Union.
Mulder: Not to mention certain fringe elements who accuse our government itself of space sabotage. The failure of the Hubble Telescope and the Mars Observer are directly connected to a conspiracy to deny us evidence.
Scully: Evidence of what?
Mulder: Alien civilization.
Scully: Oh. Of course.