Along the lines of a bomb concealed in a body cavity, if it is in the butt, vagina, stomach, or medically inserted inside the body, for the purposes of getting it onto a airplane to detonate it in a suicide attack.
Could enough material be stored ‘on board’ the person to actually bring down the airplane? Remembering that the body of the suicide attacker will absorb some of the explosive force.
If it’s merely stuffed, rather than sewn in, and can be removed for detonation, then I don’t think it would be all that hard - a shaped plastic explosive charge can do a lot of damage for quite a small size.
If it’s sewn in, it might still be possible, because it could be a fair bit bigger.
Well, from what I have read Pan Am 103 was brought down by about half a kilo of plastic explosive. Apparently the density is similar to christmas pudding ( I am assuming they mean physical density and not electron density or some other term).
Bearing in mind that the weapon delivery system in this case can physically position the device for maximum effectiveness (presumably up against the skin of the aircraft?) I would have thought that a similar amount would be adequate even inside a person. Drug smugglers often swallow a kilo or more of drugs, so there should be plenty of room inside a person, especially if you have access to someone with enough training to open them up and insert it. If you can fit a sixteen-ounce steak with all the trimmings inside someone, a sixteen-ounce bomb shouldn’t be that hard.