It is well known that there is a high incidence of Ufo's seen near or prior to the crash of jets and commerical planes. Whether the ufos were the cause of these crashes is still under question, however it is hypothesized that as Ufo's may interefere with the EMF field, this may effect sensitive navigation and propulsion equipment on a plane or jet - temporarily stalling the plane and possibly leading to crashes if not restabilized. Debunkers argue that the ufos are actually just birds which get sucked into the planes engines and cause mechanical failure. - However many pilots dispute this as sightings report actual brightly lit unidentified craft. The following videos provide great examples of this

Originally posted by ufossydney
It is well known that there is a high incidence of Ufo's seen near or prior to the crash of jets and commerical planes.