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A crane lowers a segment of one of the Tail Service Mast Umbilicals (TSMU) to its other segment at Precision Fabrication Cleaning in Cocoa, Florida. The connectors that will provide liquid propellants and power to the Space Launch System (SLS) rocket’s core stage engine are being cleaned and processed at the facility. The second of two TSMUs recently began processing. The first already is well under way and expected to be completed in July, before being moved to the Launch Equipment Test Facility at NASA’s Kennedy Space Center in Florida for testing and validation. The TSMUs will connect to the zero-level deck on the mobile launcher, providing fuel and electricity to the SLS rocket before it launches on Exploration Mission 1. The center’s Engineering Directorate and the Ground Systems Development and Operations Program are overseeing processing and testing of the umbilicals