The concept of anyone being able to actually do that kind of chemical hocus pocus in a passenger aircraft seems pretty implausible. I'd have thought that there's vastly more likelihood of being able to get some explosive device rigged to go off into the cargo hold. Or internally, like "drug mules". Basically if someone is ready to die in the process of killing other people, I can't see how there can be any way of guaranteeing to stop them.

Maybe one thing that could come out of all this is that the world's love affair with getting around by passenger aircraft could peter out. And that would be very good news indeed for the planet.

During the Hitler War they had posters saying "Is your jouney really necessary?" Perhaps we'll see the same slogan comes out of mothballs to be re-used now.