It's not so much the amount as where you put it. A tiny amount taped to a window would blow out the glass and depressurise the plane. In the chaos that followed, you could use another piece on the wall of the plane to rupture the skin. Or, as Dennis said, you could remove the explosive in the toilet (good idea if it's 'personally concealed') and I would then light it and toss it into the waste-paper shute. That whole waste module is all metal and would make a fierce bomb and could blow out the rear of the plane. A small piece in an overhead bin could really do some harm because it would explode in an enclosed space and probably blast through the outer skin. The people assembling and loading the aircraft toilets need some of the tightest security clearance because that would be an ideal place to conceal a real bomb. To close, the 'heel bandit' made a mistake by choosing this time of year when planes are full. If he'd waited until the off season and a boarded half-empty plane, he might have got away with it. Hard to pull explosive out of your shoe when there are people all around you. Geoff -------prev message ------------------------ >Does anyone know for a fact if the amount of C4 you can put in the heel = >of a shoe will cause a large plane to crash? I see new reports that it = >is so, but we all know about new reports. > >Happier New Year > >Gerry K8EF