Today we're getting a history and engineering lesson with Elon Musk about SpaceX's Raptor engine. We talk about some of the early design decisions and how the engine has evolved.

Today we’re going up SpaceX's Orbital Launch Tower with the ultimate tour guide, Elon Musk. He’s going to walk us around the bottom, explain how they plan to catch the booster with the chopsticks and then we'll go up the elevator stopping at the quick dis...