various info on Aaron Alexis here:
http://www.washingtonpost.com/blogs/liveblog/wp/2013/09/16/shooting-at-washington-navy-yard/?sdfggfds#liveblog-entry-17942
says he had “general” discharge from Navy which is not an honorable discharge....
Thanks,Fox is saying doubt another shooter.Might have been a responder that people saw.