This is the great award winning documentary on the Phoenix Lights, the largest UFO sighting in modern history. Over ten thousand people saw it and it lasted for hours. Even minded and intelligent analysis of the occurrence.

Link: https://www.youtube.com/watch?v=HGS09LzpARs

Interestingly, Kurt Russell was probably the first person to report them to air traffic control as he was piloting his plane in the area at the time: https://kimcampion.com/aliens/kurt-russell-and-the-phoenix-lights/

p.s. no need to be afraid of aliens: