There is just one thing I would recommend. The intro that briefly describes the premise was the only part I didn’t like. If possible, I find it’s more effective to incorporate that kind of thing into the actual telling of the story. Insert facts about it into the dialogue so the reader can piece together what happened themselves; that way, not only does it seem more natural, it also helps keep the reader interested because they will be gradually piecing together what happened… in other words, it’s one more thing for them to be on the edge of their seat about.
Keep it up. You are a very skilled writer.