This episode of "Mysteries of UFOs" delves into the perplexing event known as the Phoenix Lights, which occurred on March 13, 1997, in Arizona. The phenomenon involved a series of sightings of mysterious lights moving across the sky, witnessed by thousands of people. Despite attempts by the U.S. Air Force to attribute the lights to military flares, the explanation fell short, leaving the incident shrouded in mystery. The episode explores eyewitness testimonies, media coverage, government responses, alternative theories, ongoing investigations, and the enduring legacy of the Phoenix Lights.