... at risk, but NASA plans to test planetary defense systems when a small asteroid passes by in October https://t.co/c3AiicZVLM pic.twitter.com/aTZzy2WQfl — CNN (@CNN) August 6, 2017
... at risk, but NASA plans to test planetary defense systems when a small asteroid passes by in October https://t.co/c3AiicZVLM pic.twitter.com/aTZzy2WQfl — CNN (@CNN) August 6, 2017