SpaceX 're-usable rocket' flies
California's SpaceX company has successfully re-flown a segment from one of its Falcon 9 rockets.
The first-stage booster, which was previously used on a mission 11 months ago, helped send a telecommunications satellite into orbit from Florida's Kennedy Space Center.
The booster was also brought back under control to land on a barge stationed out in the Atlantic.
- From the section Science & Environment