Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a crane is used to lift the Space Launch System (SLS) Core Stage pathfinder high up in the transfer aisle on Oct. 16, 2019. The pathfinder is being lifted up to the 16th level and will be lowered into High Bay 3. The 212-foot-long core stage pathfinder arrived on NASA's Pegasus Barge at Kennedy’s Launch Complex 39 turn basin wharf on Sept. 27, 2019. The Pegasus Barge made its first delivery to Kennedy in support of the agency's Artemis missions. The pathfinder is being used by Exploration Ground Systems and its contractor, Jacobs, to practice offloading, moving and stacking maneuvers, using important ground support equipment to train employees and certify all the equipment works properly. The pathfinder will stay at Kennedy through at least the month of October before trekking back to NASA's Michoud Assembly Facility in Louisiana.