The Phoenix Lights event was one of the biggest mass UFO sightings of all time which occurred in Sonora, Mexico and Phoenix Arizona on March 13th, 1997.
This Phoenix Lights documentary explores the events of that day and attempts to put together information surrounding the lights which were witnessed by thousands of people. The light phenomenon could be seen about 300 miles south of the border with Nevada and was reportedly assembled in a v-shape which was roughly the size of a football pitch.
The Phoenix Lights were even seen by the then governor of Phoenix Fife Symington. In a press conference he famously mocked ideas they could have alien origins, though years later he admitted what he saw looked "otherworldly".