Kelly, D-Ariz., a retired astronaut, had challenged Musk to climb into a rocket ship by the time the social media spat concluded on Friday afternoon. “Hey @ElonMusk, when you finally get the ...

The landing legs stuck up in the air and the melted body of the rocket hung off the side of the drone ship — making the first-stage booster nearly unrecognizable to casual observers. The only ...

The company said the ship is designed for vertical takeoff and landing on any hard surface. Unlike SpaceX's Falcon 9 rocket, which has been flying with a partially reusable design for years ...