Monique's Spirit Being Picture

We're not sure what made Monique's sister look as if a spirit being is around her, but take a look:
"My sister was visiting me last week and we took this photo of her in public.  I'm not sure if it is a ghost or an angel, but after I had a close look at the photo, it shows a woman with glasses and wings."

We have seen flash settings on digital cameras create hazes and light anomalies, but we must admit that this photograph is very different from that. Notice the areas that are blue and white...was this a spirit being with her sister?