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Delta II Interstage
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Delta II Interstage

January 15, 2013
At Vandenberg Air Force Base in California, the interstage of the United Launch Alliance Delta II that will carry NASA's National Polar-orbiting Operational Environmental Satellite System Preparatory Project (NPP) satellite into space is lifted up the side of NASA's Space Launch Complex-2. The interstage provides an interface between the launch vehicle's first and second stages. Image credit: NASA/Rudy Bledsoe,VAFB July 21, 2011