I was on a tour of area 51. in the area that is flat and am not sure of the name but where alien head rock is located i took several pictures of the surrounding area. all pictures show a cloudless sky. when i got home and looked through the pictures i laughed and joked one cloud in the sky and it looks like a ufo. i even posted it on facebook and let it go as an odd cloud formation. going through my pictures at a much later date i decided, on a whim, to enlarged the picture and look at my ‘cloud’. it has very straight edges and right angles, and appears to glow.