Remembering Astronaut Paul Weitz via NASA https://t.co/mjZl0WVsTU http://pic.twitter.com/6qfingGNeE
— martinengwicht (@martinengwicht) October 24, 2017
from Twitter https://twitter.com/martinengwicht
learning by doing
Remembering Astronaut Paul Weitz via NASA https://t.co/mjZl0WVsTU http://pic.twitter.com/6qfingGNeE
— martinengwicht (@martinengwicht) October 24, 2017
from Twitter https://twitter.com/martinengwicht