SpaceX was started by Elon Musk to accomplish his vision of making space vehicles re-usable, thus making space exploration cheaper and more do-able, thus enabling humans to go to Mars. Bringing used space vehicles back to earth in one piece was the first essential task, and they've done that.
Another step was just accomplished on Saturday - the first ever "Dragon Reflight." Their Dragon capsule (originally launched as CSR-4) was launched a second time (CSR-11) to take supplies to the International Space Station (ISS).
Here is the 45-minute webcast released by SpaceX. This one, unlike their previous videos, has lots of info about the science involved.
Why the business label? SpaceX is a business. It makes a product, space flight, which its customer (NASA) wants and is willing to pay for.
(cont'd tomorrow)
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