Elon Musk @elonmusk
@WholeMarsBlog @NASASpaceflight @BBCAmos Higher structural margins overall are needed for reuse, plus: Booster - Grid fins for aero control - Boostback & landing propellant tanks - Protecting engines from entry loads Ship - Body flaps for aero control - Deorbit & landing propellant tanks - Heat shield — PolitiTweet.org
