The bomb plot

We are being told that this was a sophisticated plot and we must restrict liquids on planes to prevent future attacks. My information indicates the plot was not new or especially sophisticated. It also suggests we should have been enforcing a liquid ban a long time ago.

In 1994, Yousef and Khalid Sheik Mohammed started testing airport security...The two had already converted fourteen bottles of contact lens solution into bottles containing nitroglycerin, which was readily available in the Philippines. Yousef taped a metal rod to the arch of his of foot in place of the detonators...

The Bomb

The "Mark II" "microbombs" had Casio digital watches as the timers, stabilizers that looked like cotton wool balls, and an undetectable nitroglycerin as the explosive. Other ingredients included glycerin, nitrate, sulfuric acid, and minute concentrations of nitrobenzene, silver azide (silver trinitride), and liquid acetone. Two 9-volt batteries in each bomb were used as a power source. The batteries would be connected to light bulb filaments that would detonate the bomb. Murad and Yousef wired an SCR as the switch to trigger the filaments to detonate the bomb. There was an external socket hidden when the wires were pushed under the watch base as the bomber would wear it. The alteration was so small that the watch could still be worn in a normal manner.