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FILE - This artist's rendering provided by Sierra Nevada Space Systems shows the company's proposed Dream Chaser spacecraft docking with the International Space Station. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/Sierra Nevada Space Systems)