Delta II Solid Rocket Motors
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Delta II Solid Rocket Motors

January 15, 2013
At Vandenberg Air Force Base in California, a solid rocket motor for the United Launch Alliance Delta II that will carry NASA's National Polar-orbiting Operational Environmental Satellite System Preparatory Project (NPP) satellite arrives at NASA's Space Launch Complex-2. Image credit: NASA/Dan Liberotti,VAFB July 28, 2011

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