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    NASA launch to take four astronauts to space station scrubbed

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NBC News NOW

NASA launch to take four astronauts to space station scrubbed

02:15

NASA has scrubbed its launch to take four astronauts to the International Space Station, which is one of the first steps in returning NASA astronauts Suni Williams and Butch Wilmore’s back to Earth. NBC News' Tom Costello has more on the reasons for the scrub.