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KENNEDY SPACE CENTER, FLA. - In the Space Station Processing Facility at NASA's Kennedy Space Center, John Hoog secures a bag filled with prepared meals for the crew of mission STS-121 before packing into containers for the flight. At left is Dennis Huefner, with United Space Alliance (USA) ground operations. Hoog is a USA-FCE/EVA representative from Johnson Space Center. Astronauts select their own menus from a large array of food items. Astronauts are supplied with three balanced meals, plus snacks. Foods flown on space missions are researched and developed at the Space Food Systems Laboratory at the Johnson Space Center (JSC) in Houston, which is staffed by food scientists, dietitians and engineers. Foods are analyzed through nutritional analysis, sensory evaluation, storage studies, packaging evaluations and many other methods. Each astronaut’s food is stored aboard the space shuttle and is identified by a colored dot affixed to each package. Launch of Space Shuttle Discovery on mission STS-121 is scheduled for July 1. Photo credit: NASA/Jack Pfaller