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NASA technicians and Hensel Phelps construction workers monitor the progress as a construction worker with S&R Enterprises of Harrisburg, Pennsylvania, works on the bolts that will attach the second half of the G-level work platforms, G north, for NASA’s Space Launch System (SLS) rocket, to High Bay 3 of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida. The G-level platform will be installed on the north side of High Bay 3, at about the 14th floor level. The G-level work platforms are the fourth of 10 levels of work platforms that will surround and provide access to the SLS rocket and Orion spacecraft for Exploration Mission 1. The Ground Systems Development and Operations Program is overseeing upgrades and modifications to VAB High Bay 3, including installation of the new work platforms, to prepare for NASA’s journey to Mars