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/r/SpaceX CRS-7 Official Post-Launch Conference Thread(r/spacex)
Having read this book about him www.amazon.com/Elon-Musk-SpaceX-Fantastic-Future/d… I can say I actually can imagine him being pissed. People forget great men like him also fall along the same lines as Bill Gates and Steve Jobs. They are relentless when it comes to execution.