This still from a SpaceX video shows the company's Dragon space capsule firing thrusters during a powered descent as it aims for a vertical landing at its launch site. The plan is part of SpaceX's ... more 
This still from a SpaceX video shows the company's Dragon space capsule firing thrusters during a powered descent as it aims for a vertical landing at its launch site. The plan is part of SpaceX's vision for a completely reusable rocket and spa less 
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SPACE.com | Photo By SpaceX
Thu, Mar 28, 2013 4:12 PM EDT