Some say alien abductions are nothing more than fevered, unexplained night visions that make their victims believe they were the guinea pig of an interstellar joyride.
Others believe the stories as cold hard fact, that aliens are using humans to unlock all of the mysteries of the universe, which may or may not have something to do with an ultrasound probe in an uncomfortable place.
According to a former Pentagon consultant and prominent author and lecturer, President Eisenhower met with aliens on at least one occasion during his presidency. Timothy Good, who worked with the Eisenhower administration, made this claim on a recent BBC program.