Watch the Falcon 9 launch from pad 39A

Working overnight on Florida’s Space Coast, SpaceX technicians transferred a two-stage Falcon 9 rocket from the company’s commercial hangar a quarter-mile up the ramp to launch pad 39A early Saturday, positioning the kerosene-fueled booster for liftoff Sunday with a classified payload for the U.S. government’s National Reconnaissance Office.

A SpaceX Falcon 9 rocket fired into space from Florida’s Atlantic coastline Monday with a clandestine payload for a U.S. government spy agency, then returned to Cape Canaveral for a pinpoint landing.

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.