“Entering terminal count autosequence. 60 seconds to engine fire. #DragonLaunch,” tweeted Elon Musk as his space company was less than a minute away from it’s historic flight. But the launch didn’t happen. Nothing happened as longtime NASA commentator George Diller counted down the seconds, “3..2..1…We’ve had a cutoff. Liftoff did not occur.” Musk tweeted 11 minutes later at 5:06am EDT, “Launch aborted: slightly high combustion chamber pressure on engine 5. Will adjust limits for countdown in a few days.”