While you are doing your research please see if you can ascertain the reason Nancy Pelosi repeatedly turned down requests to beef up security for Jan 6, 2021.
How did security experts not know a riot could happen? It was to easy to predict. It would be criminally negligent to ignore the threat. I don't think they were criminally negligent. I think the security experts were told to stand down. It was politicians like Nancy Pelosi that were criminally negligent. She wanted it to happen so kept turning down requests to beef up security.