SpaceX's Falcon 9 rocket with Dragon spacecraft rolls out to Launch Complex 39A at NASA's Kennedy Space Center in Florida on Dec. 19, 2021, in preparation for launch. The agency's 24th Commercial Resupply Services mission, targeted for liftoff on Dec. 21, 2021 at 5:06 a.m. EST, will deliver new science investigations, supplies, and equipment to the crew on board the International Space Station.