Space station back to normal after shutdown

SPACE CENTER, Houston -- Operations aboard the international space station were back to normal Monday following a three-hour shutdown of life-support and scientific equipment, NASA said.

Engineers believed bad computer data led to Sunday's automatic and orderly shutdown.

Officials said the three space station residents were never in danger or even discomfort. The temperature inside remained comfortable, and there was more than enough oxygen to breathe.

Gerstenmaier said the trouble began when the cooling system in the Russian-built living quarters stopped working and on-board computers started shutting off equipment as a precaution. The other cooling line did not kick in, triggering the widespread shutdown, Gerstenmaier said.

Two Americans and one Russian have been living on space station Alpha since December. Space shuttle Endeavour is scheduled to lift off May 30 to bring them home.

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