Training 'Guardian Angels' via NASA https://t.co/ldZqa3eAl5 pic.twitter.com/3FyXcgv89a
— martinengwicht (@martinengwicht) May 2, 2018
from Twitter https://twitter.com/martinengwicht
learning by doing
Training 'Guardian Angels' via NASA https://t.co/ldZqa3eAl5 pic.twitter.com/3FyXcgv89a
— martinengwicht (@martinengwicht) May 2, 2018
from Twitter https://twitter.com/martinengwicht