Anyone believe in Ghosts ?

My wife and I were In Gettysburg PA. a few years back and went on a
candle light ghost tour of the town. We ended up near the cemetery.
My wife decide to take a picture of some monuments with the moon
behind them. We were surprised when we had the film developed and saw
the picture with the orbs in it. There was nothing wrong with the camera the other pictures were ok.
Here's the picture.