Well, we just got to see some prototypes of the device, including the basic CORE 2 band, its metal bracelet and swappable plastic face plate accessories, and learned a bit more about the device.

ENGADGET: BodyMedia CORE 2 armband and View patch health monitors hands-on

Dennis Johnson of Natural Space Domes in Minnesota sells kits for building a dome home either the entire pre-fabricated kit with framework and sheeting and interior panels or a basic kit, which just includes the metal connection brackets.

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There are two basic ways to play gold: own the metal or own the miners.

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The basic design--a long piece of metal, with a serrated blade, attached to a handle--didn't change much for several millennia.

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Officials have told CNN that among the materials used in the attack on the marathon were some sort of timing device, a basic mixture of explosives and some sort of metal container containing nails and other projectiles.

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All of the system's components, including the main control unit, the processor, the speakers, the subwoofers and even one of the two remotes (the second "subremote" provides only basic functions) share an attractive rosewood-framed metal theme.

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These are bigger than arrowheads, of course, and are made of metal and plastic, which are easier to detect, but their basic purpose is essentially the same.

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