Throughout my life, I have had several experiences that I believe involved things not of this Earth. With due diligence, and objectivity, I can dismiss some of them as normal Earthly events, but there are still a good handful of moments that will not accept rational explanations.
I believe that there are 'hot spots' for UFO activity all across the globe, and Arizona is one of them. When I lived in other parts of the country, I started to discount my prior experiences because they weren't happening to me anymore. Within weeks of moving back to the valley, I began to catch oddities in the skies once again.