SpaceX successfully re-launches its first used rocket
Elon Musk-led space exploration startup SpaceX on Friday successfully launched its pre-used Falcon 9 rocket, marking the first time an orbital class rocket has been relaunched. "We're not one-way trip to Mars people. We want that whoever we take can come back," said SpaceX COO Gwynne Shotwell. Congratulating the SpaceX team, Musk tweeted, "Next goal is reflight within 24 hours".