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Engineers and technicians with Jacobs Engineering on the Test and Operations Contract monitor the progress as a crane is used to move one of two pathfinders, or test versions, of solid rocket booster segments for NASA’s Space Launch System (SLS) rocket. At far right, the first pathfinder booster segment has been secured in the vertical position on a test stand. Inside the RPSF, the Ground Systems Development and Operations Program and Jacobs will prepare the booster segments, which are inert, for a series of lifts, moves and stacking operations to prepare for Exploration Mission-1, deep-space missions and the journey to Mars