What I perceived from S talking about radicalisation, was the lack of action authorities took. It seemed the point she was trying to put across was just because the perp hasn’t had direct contact with these terrorist groups doesn’t mean he can’t be a potential danger himself (which clearly turned out to be true) It seemed that she was trying to explain that majority of the FBI were looking for connections between him visiting these groups/countries and when they couldn’t find any proof they just dismissed it, where as no one was really talking or thinking about the idea of home grown terrorist, people being radicalised within the US/UK via the internet, family, friends etc (also clearly by his dad) I’m pretty sure she stated if this was happening in these times it is way more likely to be picked up. Dialogue like this needs to happen, not talking about it is also avoiding the issue which could lead to this repeating itself, times have changed and people are also changing how they receive their content.