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- An automatic reaction to walking into a dark room is to turn on the
- light. This can be fatal, if a lightbulb bomb has been placed in the overhead
- light socket. A lightbulb bomb is surprisingly easy to make. It also comes
- with its own initiator and electric ignition system. On some lightbulbs, the
- lightbulb glass can be removed from the metal base by heating the base of a
- lightbulb in a gas flame, such as that of a blowtorch or gas stove. This must
- be done carefully, since the inside of a lightbulb is a vacuum. When the glue
- gets hot enough, the glass bulb can be pulled off the metal base. On other
- bulbs, it is necessary to heat the glass directly with a blowtorch or
- oxy-acetylene torch. When the bulb is red hot, a hole must be carefully poked
- in the bulb, remembering the vacuum state inside the bulb. In either case,
- once the bulb and/or base has cooled down to room temperature or lower, the
- bulb can be filled with an explosive material, such as black powder. If the
- glass was removed from the metal base, it must be glued back on to the base
- with epoxy. If a hole was put in the bulb, a piece of duct tape is sufficient
- to hold the explosive in the in the bulb. Then, after making sure that the
- socket has no power by checking with a working lightbulb, all that need be
- done is to screw the lightbulb bomb into the socket. Such a device has been
- used by terrorists or assassins with much success, since nobody can search the
- room for a bomb without first turning on the light.
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