50 Years of Spaceflight: The Road Ahead
Private Space Tugs on the Way
NASA's Orion, Russia's Soyuz and Progress, and the European Space Agency's ATV cargo ship aren't the only space tugs under development. Private companies, some competing for NASA contracts, are building their own spaceships to haul freight into orbit. Here, California-based SpaceX's Dragon capsule is docked at the International Space Station in an artist's rendering. VIDEO!
Credit: SpaceX
   
 
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