I've seen them. The photos are either faked or too blurry to distinguish between flare on the lense, aircraft, clouds or birds. I have not seen one photo of any significant quality to know what has been photographed. Here is one as fake as a three dollar bill (if you look closely you see the wires holding the thing up):
![](http://www.alexnolan.net/articles/&ufo6.jpg)
And, when they have to fake them, you know it is all science fiction fantasy.