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RT @vijay_r_kumar: Mark Yim, a 2018 National Academy of Inventors Fellow showcasing a Guinness Record winning flying robot – Power of @Penn… April 12, 2019, 1:40 pm
RT @vijay_r_kumar: Mark Yim, a 2018 National Academy of Inventors Fellow showcasing a Guinness Record winning flying robot – Power of @Penn… April 12, 2019, 1:40 pm
