For years, critics have been taking shots at NASA's plans to corral a near-Earth asteroid before moving on to Mars — and now NASA's chief has a message for those critics: Get over it, to be blunt. ... more 
For years, critics have been taking shots at NASA's plans to corral a near-Earth asteroid before moving on to Mars — and now NASA's chief has a message for those critics: Get over it, to be blunt. NASA Administrator Charles Bolden defended the space agency's 20-year timeline for sending astronauts to the Red Planet on Tuesday, during the opening session of this year's Humans 2 Mars Summit at George Washington University in the nation's capital. less 
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Tue, Apr 22, 2014 4:20 PM EDT