The space rocket industry in Ukraine has been managed by the National Space Agency of Ukraine since 1992. The agency includes 30 enterprises, scientific research institutes, and design offices. Pivdenne Design Bureau is in general responsible for creating the Zenit-3SL carrier rocket. The National Space Agency of Ukraine is involved in cooperation with American Rockwell Int., as well as the Sea Launch project. The first stage core of the U.S. Orbital ATK Antares rocket was designed and is manufactured in Ukraine by Yuzhnoye SDO.