GREGORY L. REECE has written:

'ELVIS RELIGION: THE CULT OF THE KING'

'UFO RELIGION: INSIDE FLYING SAUCER CULTS AND CULTURE'

within the past six months or so, the Vatican acknowledged the probable existence of extraterrestial occupants of UFO"s but that is as far as it goes.

a UFO See http://grammar.ccc.commnet.edu/grammar/abbreviations.htm (all the way to the bottom) for help determining when to use a or an before an abbreviation.

Perhaps UFOs are at the very heart of religion. A website that contains a wealth of well- documented information on this question can be found at The Bible UFO Connection website (see related link)

They usually see UFO's at a UFO sighting