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VANDENBERG AIR FORCE BASE, Calif. – Col. Marc Del Rosario, commander of the 30th Space Wing Operations Group, addresses the audience of a NASA Social held for NASA's Soil Moisture Active Passive mission, or SMAP, at Vandenberg Air Force Base in California. This NASA Social brought together mission scientists and engineers with an audience of 70 students, educators, social media managers, bloggers, photographers and videographers who were selected from a pool of 325 applicants from 45 countries to participate in launch activities and communicate their experience with social media followers. The SMAP mission is scheduled to launch from Vandenberg on Jan. 29. To learn more about SMAP, visit http://www.nasa.gov/smap. Photo credit: NASA/Kim Shiflett