What does LH stand for?

9 million litres) of liquid oxygen and liquid hydrogen into Discovery's fuel tank on Friday afternoon for a third launch attempt.

Engineers, he said, commanded the liquid hydrogen fill-and-drain valve in Discovery's main propulsion system to open and close five times, "and it worked.

Engineers, he said, commanded the liquid hydrogen fill-and-drain valve in Discovery's main propulsion system to open and close five times, "and it worked.

He also acknowledged he had sent them in December 2003 a specific military document detailing the design of liquid hydrogen tanks crucial to launching vehicles into space, the Justice Department said in a statement.

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Two of the four sensors in the shuttle's liquid hydrogen tank indicated that the tank was dry, even though there was fuel inside.

Global Observer will run on liquid hydrogen fuel, which has an energy density that is 3.

The car can run for 125 miles on the eight-kilo capacity liquid hydrogen tank, and then do a further 300 miles under petrol power from the 74-litre fuel tank.