Update 4:06 PM 8/31: SpaceX stood down from launch due to an issue on engine #4. The next launch opportunity is Friday September 1st at 7:26 a.m. PT (14:26 UTC). SpaceX is targeting the launch of the 2nd Tranche 0 mission for the Space Development Agency on August 31st at 7:26 a.m. PT (14:26 UTC) … Continue reading SpaceX to launch military communications satellites