I'm thinking back to the 1990s when there was a bombing of a federal building in the United States. That bomb was made largely of things that are legal: fertilizer, diesel, and so on. I know there was a response then. Of course, there's the inevitable public outcry when something like this happens: how did this happen and how can we stop it? They were things that, for all intents and purposes, were good and positive materials that could be used for very destructive means, in much the same way, I would say, as you've talked about some of the precursors of methamphetamine. Many of them are useful but extremely dangerous in their final form. It's not enough just to stop them, perhaps when it's too late. It has to be stopped earlier on.
Are there any parallels we can draw from that experience?