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A construction worker watches as a heavy-lift crane lifts the second half of the G-level work platforms, G north, for NASA’s Space Launch System (SLS) rocket, up from the floor of the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida. A special tool called a Tandemloc helps keep the platform level as it is lifted. 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.