Thanks for getting back to me, Technoguy. I saw a local news item on this last night. Anyway...they would have to do a real good search of a person's luggage to find such an incendianary device as is proposed. You could contrive a very small and effective device using a watch with a plastic case, without band, and have just enough Semtex (or whatever the latest designer explosive is called) to put a hole in the plane. I think I would just attach the watch to my contraband toenail clippers - that would get the SWAT team onto the tarmac quick!