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Want to hear my thoughts on Mars Sample Return, Orbital Debris and Boeing Starliner? Be sure check out my latest episode of  @SpacewalkPodcast ! 

Episode 2 of  @SpacewalkPodcast  is out now! Of course it's available here on YouTube or on any of your preferred podcast apps! Don't forget to ask questions using  #spacewalkpodcast  to get your questions or topics on air! 

I'm getting a lot of questions / suggestions from my last video talking about air launching, suggesting starting higher than 10 km (30,000 ft), could reduce the size of booster in half. To those people, be sure and watch Part ONE of "Why don't they just" where we talk about why altitude isn't as important as velocity!