The pieces have an Egyptian look and mirrored sides that bounce light from a low-powered diode laser at one another and consequently knock each other out of the game.

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Neutrons ejected from a watery surface move much more slowly than those from a rocky one, because the hydrogen nuclei in water are light enough for an exiting neutron to knock around much like one billiard ball hitting another a process that slows the neutron down.

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One after another these supposedly concerned citizens walked into a knock-off solitary confinement cell furnished with a dirty toilet and television cameras.

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Given Pakistan's history of rigged elections, the fear is that the authorities in Islamabad will use the time to knock out many politically unacceptable candidates and tailor the results to their liking on one pretext or another.

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