that's the big key, reusable steerable, landable. >> how big a game-changer would it be? >> major, because it gives space x. the ability to launch very heavy pay let's. this will launch satellites from the united states. that's an important point. it will carry off their upcoming space capsule and any other future components that are needed for deep solar system exploration. this heavy lift vehicle will be the one that can carry those roads. a different rocket, and it tried to land on a platform in the ocean, but it exploded on impact, apparently because of of all things, a lack of gas. do you think this is going to work? >> i think it is going to work. it was a lack of hydraulic fluid that they needed to lower the leg so it could stand on the platform. they had a wonderful outing. this is only the second time they've attempted it. the first time they attempted it on the mobile platform itself and musk things they'll hit it on target next time and if not then, probably the time after that. they are way ahead of everybody else in the industry conquering this particular pie