This reminds me of
Operation Bojinka.
Now this is interesting:
"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. Yousef and Mohammed wore jewelry and clothing with metal to confuse airport security. They packed condoms in their bags to support their story that they were meeting women"