One of the main issues with people who investigate UFO phenomena is that it is very difficult to separate objective observation from personal interest. Many people who get into the investigation of UFO’s do so because either they want to believe in UFOs, or they have already had an experience that they attribute to UFO phenomena. Thus, it is often difficult to substantiate their claims as wholly impartial and unbiased, especially when faced with the staggering lack of conclusive evidence for the existence of UFO’s and the allegations made by many of these investigators that world governments have conspired to cover up the existence of extra-terrestrial life.