President Obama said Tuesday that he wants private companies to help send humans to Mars by the 2030s.

Obama first said in 2010 he wanted to send astronauts “to orbit Mars and return them safely to Earth” by the mid-2030s with “a landing on Mars” to follow. In that speech at the Kennedy Space Center, Obama added that he expected to see such a landing in his lifetime.

In an opinion article Tuesday on CNN.com, Obama said private companies would be key to those lofty goals.

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