Crews from the show ``UFO Hunters" are in the Valley to investigate the strange lights in the Phoenix sky more than a decade ago.
Bill Burns hosts the show, which airs every Wednesday night on the History Channel.
``Nobody has ever really come to the conclusion of what it was," Burns said. ``We can't say it was extraterrestrial, we can't say it's inter-dimensional, we can't say it's a time ship."
Burns and his crew wants to hear from anyone who saw the ``Phoenix lights" in the north Valley sky on March 13, 1997. Thousands of people reported seeing a triangular formation of lights and a separate series of stationary lights.
``Was it ours, was it THEIRS, or was it flares?"
Those are the three questions Burns wants answered.
``You can only speculate that it's from another world unless the people from the other world actually pop up and say, `live and prosper,'" he said.
``So for any witnesses, even if you've spoken to the press before, spoken to TV before, spoken to anybody, we'd love to hear your story."
Besides the Phoenix lights, stories of other unidentified flying objects are welcome.
Burns' crew travels all over the country to hear people tell of ``close encounters."
``In some cases, we've been inundated," he said. ``I know in Texas last year, we actually had scores of people turn up."
Burns and his crew will be at the Holiday Inn Express near Phoenix Sky Harbor International Airport on Friday to talk with those who have stories about the Phoenix lights or other UFOs.