Elon Musk's SpaceX launched a Falcon 9 rocket from California on Monday carrying 64 small satellites into low orbit around the Earth, which the company called the largest-ever "rideshare" mission by a U.S.-based rocket. The mission, dubbed SSO-A, also marked the third voyage to space for the same Falcon 9 rocket – another milestone for SpaceX's cost-cutting reusable rocket technology.