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The competition heats up: SpaceX has rearranged the payloads for its next two launches, delaying the SES-9 geosynchronous communications satellite launch until December to instead launch 11 Orbcomm low-orbit satellites in November.
Using the upgraded Falcon 9, this switch will give them more fuel to try a vertical landing of the first stage on this first launch. They will then try again on the second launch.