“The Falcon 9’s two launch stages are engineered to return to earn. The first part of the rocket propels the rocket head and then returns to earth and lands where it fired from. This is done by using grid fins and the engines performing retry burning.” Elon MuskSpacexFalcon 9 Book:Innovate Like Elon Musk: Easily Participate in Innovation with Guidelines from Tesla and SpaceX: A Simple Understanding of First Principle Thinking and Vertical Integration Source: Innovate Like Elon Musk: Easily Participate in Innovation with Guidelines from Tesla and SpaceX: A Simple Understanding of First Principle Thinking and Vertical Integration