After its journey from NASA’s Stennis Space Center in Mississippi aboard the Pegasus barge, the mighty Space Launch System (SLS) core stage arrives at the agency’s Kennedy Space Center in Florida on April 27, 2021. In view is the iconic countdown clock at the NASA News Center, commonly referred to as the Press Site. The core stage is the final piece of Artemis hardware to arrive at the spaceport and will be offloaded and moved to Kennedy’s Vehicle Assembly Building, where it will be prepared for integration atop the mobile launcher with the completed stack of solid rocket boosters ahead of the Artemis I launch. The first in a series of increasingly complex missions, Artemis I will test SLS and Orion as an integrated system prior to crewed flights to the Moon.