SpaceX fails in latest attempt to land rocket on ocean barge

SpaceX fails to successfully land rocket back on its floating droneship (Source: SpaceX/Flickr)
After three successes, a leftover SpaceX rocket booster crashed Wednesday while trying to land on an ocean barge.
The attempt came minutes after the Falcon 9 rocket successfully launched two satellites from Cape Canaveral, Florida.
SpaceX chief Elon Musk said via Twitter that there was a problem with one of the three engines used to slow the first-stage booster for landing. He said it may be the hard