Blue Origin fired up their BE-4 engine for the first time, which is a big moment. And I share some meandering thoughts on the future of commercial and military launch.

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Blue Origin on Twitter: “First hotfire of our BE-4 engine is a success #GradatimFerociter”
Blue Origin just sent a jolt through the aerospace industry | Ars Technica
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T+64: BE-4 Fires Up, and Some Thoughts on the Future of Commercial and Military Launch

Main Engine Cut Off