SpaceX back to Falcon 9 launches as Musk eyes 'self-growing' Moon city

FAA signs off on rocket's return and CEO floats ambitious lunar settlement plan

SpaceX resumed launching Falcon 9 rockets this weekend after last week's second stage incident. At the same time, CEO Elon Musk confirmed that the company has shifted its focus to "building a self-growing city on the Moon" within a decade.…