Description: Valerie Delalieux writes: My friends and I went on a school trip to Paris, and there we took a picture of the Eiffel Tower. In the background, there is a weird black spot behind my friends and we would like to know what it is. Maybe you can help us ? That picture was taken on Thursday, April 28,-2005, between 1 and 3 PM. We hope you can help us because we really want to know what that thing is!