Voir http://acuriousguy.blogspot.lu/2016/10/sixteen-more-organizations-currently.html
Et
https://www.reddit.com/r/space/comments/56oa6r/rockets_of_the_world_circa_2025/
[youtube https://www.youtube.com/watch?v=5iBHM_bgBiE&w=560&h=315]
[youtube https://www.youtube.com/watch?v=xKoCur3lDqA&w=560&h=315]