Orbital ATK named the enhanced Cygnus spacecraft of this mission for Deke Slayton, one of NASA’s original seven astronauts and a champion of commercial space endeavors later in his career. Slayton, an Air Force test pilot before being selected for NASA, flew into space in 1975 as a member of the Apollo-Soyuz Test Project that saw an Apollo spacecraft and Soviet Soyuz connect in orbit in the first cooperative, international mission of the space age.