The private spaceflight company Space X plans to build a rocket so big it would "make the Apollo moon rocket look small,"the company's CEO, Elon Musk, announced on "CBS This Morning"on Feb. 3. The huge rocket would ultimately send colonists to Mars, but what would SpaceX do in the meantime? The company's primary focus right now is giving NASA astronauts access to the International Space Station (ISS) on American vehicles, drastically lowering prices to Earth orbit versus what the Russians are charging, Musk said... This all begs the question: If SpaceX is going to build this gargantuan rocket on its...