NASA Remembers Its Fallen Heroes, 30th Anniversary of Challenger Accident via NASA https://t.co/R5AAP3jUnt

NASA Remembers Its Fallen Heroes, 30th Anniversary of Challenger Accident via NASA https://t.co/R5AAP3jUnt

— John Prieto (@prietoj) January 22, 2016

from Twitter https://twitter.com/prietoj

January 22, 2016 at 11:08AM
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