The possibility of a liguid bianry bomb was COPMPREHENSIVELY rejected by a number of different folks. Several current affairs progs and newspapers printed detailed refutation of the 'threat'. This was done within a couple of weeks of the ban being brought in.
It was apparent that to make such a device in an equipped laboratory on the ground with knowledgable people - was difficult. To do so in the dunny of an a commercial air transport - was impossible.
Naturally, nothing has changed.