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Earth from space

The space shuttle Endeavour is silhouetted against the backdrop of Earth's horizon prior to docking with the International Space Station in this picture taken by an Expedition 22 crew member on February 9, 2010 and released by NASA February 12, 2010. REUTERS/NASA Handout (UNITED STATES - Tags: SCI TECH IMAGES OF THE DAY) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS