There are two schools of thought on this occurrence. Skeptics say it's dust, dirt, or moisture captured by the flash of a camera and enlarged by depth of field. Ghost hunters will tell you this is an energy sorce of a paranormal nature.
Let's just say that I have taken my share of night photos, but until the trip to Gettysburg, I have never experienced anything as downright freaky as this.
Hiking back to one of the most frighteningly gruesome establishments in the town (a barn that served as a makeshift operations center for amputees), Ann and I snapped the following photos...