I've still yet to see any firm evidence of why liquids are seen as the only way to cause an explosion onboard an aircraft. It's absolutely ludicrous.
Clearly Class 4 DG do not exist and in no way can solids possibly be flammable, oh and of course there are absolutely no solid oxidising agents either.
The whole "security" system is farcical, and the liquid ban is just indicative of the lunatics who are running the whole fiasco.