In an effort to satisfy my guilty pleasure, I was at huffingtonpost a few moments ago and I found this article and video. The video is exclusively licensed to huffingtonpost.
Jeffrey Ault, from Orange City, Florida was visiting Kennedy Space Center, round about the time when Challenger was to be launched. He recorded this footage using his Super 8 camera and your could see clearly the chain of events starting from the launch to the explosion of the shuttle. There are some chilling stuff heard during the video, like a woman screaming right when the shuttle explodes and Steve Nesbitt telling about the obvious major malfunction.
Click on the image to get to huffingtonpost for the video and the article.
One of the saddest events in human history.