SPACE: SpaceX launches Falcon 9 rocket, lands booster back on land. “The successful touchdown at 8:40 p.m. ET on legs within 10 minutes of liftoff was a breakthrough in Musk’s vision to lower launch costs by recovering and reusing rockets. At SpaceX headquarters in Hawthorne, Calif., workers cheered and broke into chants of ‘USA, USA,’ after the successful landing.”