This was a terrible tragedy gone wrong, and honestly I don't really know if there was something that could be done about this before the event even happened? How did this man get into the airport with a gun? Was it because he did not pass through security before shooting this man or because he chose not to? I don't think something like this should have happens and being an airport i definitely don't think this should have happened at all assuming all the security that they do have in place how was this to happen?