Astronaut Scott Kelly retiring after longest US space mission *
 

The astronaut who holds the American record for most time spent in space, Scott Kelly, will retire from NASA on April 1, the US space agency said on Friday.Kelly and Russian cosmonaut Mikhail Kornienko returned to Earth last week after nearly a...http://feeds.feedburner.com/~r/com/YEor/~4/gG8CzzSnkbY

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