Jan 11 - Elon Musk's SpaceX will lay off about 10 percent of its more than 6,000 employees, a source familiar with the matter said on Friday. The company did not comment on the number of layoffs but said in emailed comments that it needs to become a 'leaner' organization for which it would 'part ways' with some of its workforce. 'To continue delivering for our customers and to succeed in developing interplanetary spacecraft and a global space-based Internet, SpaceX must become a leaner company,' a SpaceX spokesman said. The layoffs were reported earlier by the LA Times.