Here is more in depth information on the Phoenix Lights. They go into a detailed discussion about the flares and clearly show that what, according to some are thousands of witnesses, was seen was not flares, but an actual craft that blocked out the stars as it passed over head. The video also talks about how there were not just one or two events that night, but multiple events that people had witnessed in other parts of Arizona. In other words its flight path across the state. Here is a good website with lots of detailed information on the event.
-Phoenix Lights Network