One of Dragon V2's coolest features, which should also help Musk cut costs as he competes for business, is Dragon V2's ability to land on land rather than water using thrust to control its descent, which means the capsule could be refueled and reused for subsequent flights. This propulsive landing is optional on earth, and Dragon has backup parachutes in case of emergency. But this is the way a spacecraft would have to land on a place like the moon or Mars."[Dragon] is a step in the direction of Mars," Musk said. "For Mars you need propulsive landing. You have to get really good at it."Musk says he remains focused on the idea of SpaceX reaching Mars. He joked that he'd like to see himself "unless I get assassinated by some Russian," referring to the Twitter war that arose between him and Russian deputy prime minister Dmitri Rogozin relating to American access to space. That controversy struck Musk as surreal, he said. "I thought, 'Is this the Twilight Zone?'"