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June 7, 2011
This Electronic Still Camera (ESC) image shows Dafydd R. (Dave) Williams, mission specialist, working with the Virtual Environment Generator (VEG), in the Neurolab onboard the Space Shuttle Columbia. The VEG is used to discover how the balance between visual and vestibular cues shifts toward the visual system in weightlessness. The VEG is a head-mounted display that shows computer generated virtual reality scenes generated by a 3D graphics computer.

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