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Test Stand 4693 during "topping out" ceremonies April 12 at NASA's Marshall Space Flight Center in Huntsville, Alabama.

Steel ‘Flies’ as Second New SLS Test Stand ‘Tops Out’ at NASA Marshall

A steel beam is "flown" by crane into position on the 221-foot-tall (67.4 meters) twin towers of Test Stand 4693 during "topping out" ceremonies April 12 at NASA's Marshall Space Flight Center in Huntsville, Alabama.

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