Texas - If you think that UFOs are harmless, think again. In December 1980, Betty Cash, Vicky Landrum and her young grandson were driving home when they encountered a huge diamond shaped UFO. When they stepped out of the car to take a closer look they were caught in an intense blast of heat that made them break into an instant sweat. The diamond gave a few cheeky bleeping sounds and then disappeared. But the ordeal was not over; during the next few days Cash
