Videos: Previewing SpaceX’s eighth International Space Station resupply launch

Tracking information released by the U.S. military indicates two government payloads rode a SpaceX Falcon 9 rocket into orbit Dec. 19 on the NROL-108 mission, a dedicated launch for the National Reconnaissance Office.

SpaceX test-fired its next Falcon 9 rocket at NASA’s Kennedy Space Center on Saturday in preparation for the company’s 17th launch of the year, a mission tentatively set for liftoff Wednesday with a secretive payload named Zuma for the U.S. government.

The flight will be the largest number of Starlink V2 Mini satellites on a single Falcon 9 rocket. Liftoff happened on Monday, March 31, at 3:52 p.m. EDT (1952 UTC).