SpaceX got to within 15 seconds of a launch from Cape Canaveral on Monday, but a "hold, hold, hold" call from among the mission control team members forced an abort. They were back for another try on Tuesday and pulled it off.

SpaceX aborted the launch of two communications satellites just before liftoff on Monday evening (July 21). A Falcon 9 rocket topped with two of SES' O3b mPOWER internet spacecraft was set to launch from Florida's Cape Canaveral Space Force Station at 5:27 p.m. EDT (2127 GMT) on Monday.