The Bible declares in the Book of Revelation in chapter 12 that we will see this one day when the devil and his angels will be cast down to earth. Not all angels have wings. Therefore, they must have something to fly in. We know them as UFOs.
In the book, people tell their stories of being abducted by aliens. They tell us how their lives were drastically altered. Many of them had been abducted many times. I believe you will find their testimonies different from anything you've ever read.