Can somebody explain to me why SpaceX is supposedly a "private" initiative? All their revenue comes from NASA. But NASA itself never built any of our spacecrafts: they always just contracted it out. the space shuttle was built by Rockwell, for example. What makes SpaceX any different from Rockwell, or Lockheed Martin, or Boing, or any of the other subcontractors who've been building our rockets for years?