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.

Weather permitting, SpaceX will launch two O3b mPOWER satellites today (July 21st) for SES. The Boeing-built satellites are number 9 and 10 in the mPOWER fle