A former space shuttle main engine is tested at Stennis Space Center in Mississippi in preparation for its use on the Space Launch System rocket.
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Mission Reports
NASA declares first SLS core stage complete
NASA has declared assembly complete on the core stage for the first Space Launch System heavy-lift rocket in New Orleans, signaling a long-awaited transition from manufacturing to testing as the core stage is set to move to the nearby Stennis Space Center in Mississippi for a hold-down firing next year of its four shuttle-era main engines.

Mission Reports