If you're wondering how the gunman got past security at the Trump dinner event - there's a video in this article, he ran through the security checkpoint.
It looks like an officer accidentally shoots another officer as he runs past them.
Also, a police dog spots him before it all happens in the video - but the police officer calls the dog back, not realising anything was wrong.
https://www.bbc.co.uk/news/articles/c4g7rmrlm17o
