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<b>With Food Low, Space Crew Must Cut Back<br /></b><br /><br />LINK<br /><br />The two astronauts aboard the International Space Station have been asked to curb their calories because of a food shortage, NASA officials said Thursday.<br /><br />Supplies of food and water on the station have fallen so low that if a Russian cargo vessel scheduled to arrive on Dec. 25 has a mishap or is significantly delayed, the astronauts, one American and one Russian, will have to abandon the station and return home months ahead of schedule, the NASA officials said.<br /><br />The space station manager at NASA, William Gerstenmaier, said the situation was manageable if nothing unexpected occurred. But Mr. Gerstenmaier said juggling consumable items like food, water and even light bulbs had been a challenge since the space shuttles were grounded because of the Columbia disaster in 2003.<br /><br />"This is not easy and requires lots of compromises," he said at a televised news conference at the Johnson Space Center in Houston.<br /><br />The coming delivery by the robotic Progress cargo craft, loaded with extra food and water, "is very critical," he said, adding, "There's no question about that." <br /><br />Plans are being put together for the crew to leave, Mr. Gerstenmaier said, in the event that the Progress is destroyed at launching or cannot dock with the station for some other reason. <br /><br />At that point, he said, the station will have 7 to 14 days' worth of food, at current consumption rates, and the crew will begin shutting it down for a departure early next month on its Soyuz rescue craft.<br /><br />The mission flight director, Annette Hasbrook, said the station could be safely left unstaffed for months, though it has been left empty so far only for spacewalks. Such an action would require shutting off some equipment, closing internal hatches and setting up the electronics so the station could b