I think you have gotten some great advice. Honestly don't think that it is appropriate to show the jumpers. That was horrifying and disturbing to adults. I think it is appropriate to discuss the events of that day with 7th graders, but even my 12 yr. old 8th grader has not seen the video. I am certain that she is not yet ready. (As is she.) I would want the option for her to opt of seeing the images.