Delta II Interstage
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Delta II Interstage

January 15, 2013
At NASA's Space Launch Complex-2 on Vandenberg Air Force Base in California, spacecraft technicians position 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 onto the rocket's first stage. The interstage provides an interface between the launch vehicle's first and second stages. Image credit: NASA/Rudy Bledsoe,VAFB

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