Inasmuch as I have associates amongst the visitors (not the grays -- they're just a pain in the butt with their probe thingies, and they're lousy conversationalists), I took a brief trip to the alleged site in my personal vehicle...
... and ran a detailed residual energy analysis using the XAR-717G Polyfield Scanner. The result of the investigation was that the "objects" were anomalous thermal distortions of wetbacks heading for the border.
There are no flying saucers. They are figments of the imagination. We are your friends. We come in peace.
Ackack ACKackACK ackACKACK!