NASA astronauts Don Pettit and Matt Dominick answered questions from chat and discussed daily life on the ISS.
NASA's Don Pettit impersonated fellow astronaut Matthew Dominick to show what it's like when two astronauts get to nerd out ...
NASA astronauts Sunita "Suni" Williams and Barry "Butch" Wilmore have been on the International Space Station since June, ...
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