It now wants everybody who handles high-power rocket engines to have a federal explosives license and a bunker to store them.

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Going much faster than that would require rocket power.

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The rocket engine power plant runs at a 35% thermal efficiency, versus 55% for conventional gas-fired plants.

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"There's no guarantee even if Hamas is removed from power in Gaza that rocket fire will not continue, " says Nicolas Pelham of the ICG.

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Mr Hu is a power engineer and Mr Zeng a rocket scientist.

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The rocket gives the car plenty of power, but it is either on or off.

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Instead of gunpowder or rocket motors, the railgun will use electrical power to propel the projectiles.

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However, the NASA official, Mike Suffredini, said no decisions can be made until a commission appointed by Russia completes its investigation of the August 24 crash involving a Soyuz rocket -- the same kind used to power the flights of crew members to the space station.

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