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Science SpaceX launch to space station: It's what is coming down that's key

A SpaceX rocket is bringing 2.5 tons of cargo to the International Space Station, including legs for NASA's Robonaut 2, but a test of the first stage's landing system could be the biggest prize.

By Staff writer / April 18, 2014

NASA TV/AP

All eyes are on the weather as Space Exploration Technology Corp. (SpaceX) gets set to launch nearly 2.5 tons of cargo to the International Space Station and conduct the first test of a new landing system designed to return the first stage of the company's Falcon 9 rocket to its launch pad.