NASA Astronauts Speak with Challenger Center Conference from Space Station via NASA http://t.co/xvXGTcYMM0

NASA Astronauts Speak with Challenger Center Conference from Space Station via NASA http://t.co/xvXGTcYMM0

— John Prieto (@prietoj) August 10, 2015

from Twitter https://twitter.com/prietoj

August 10, 2015 at 02:18PM
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