UFO's do exist but they are supernatural not extraterestrial ,i witnessed one myself hovering over a chemical plant in 1999. As a christian i came across the fact that Jesus & Mary had appeared to the visionary Veronica at Bayside USA (1970-94) there were many miracles performed there, amongst other things she was told was that Satan & his cohorts were flying these craft around the world to trick mankind into believing that aliens exist. As we are now living through the period covered by the Book Of Revelation, when the christian church is Raptured news media will report to those left behind that a mass alien abduction has occurred.