The United Launch Alliance/Orbital ATK Delta II solid rocket motor is towed to Space Launch Complex 2 at Vandenberg Air Force Base in California. The rocket motor will be mated to the Delta II first stage in preparation for launch of the Joint Polar Satellite System-1 (JPSS-1) later this year. JPSS, a next-generation environmental satellite system, is a collaborative program between the National Oceanic and Atmospheric Administration (NOAA) and NASA.