Watch live video of NASA test-firing the world's most powerful rocket stage for 8 minutes

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<img alt="nasa space launch system sls core stage green run stennis january 2020" class="img-responsive imported-news-entry-img" src="https://images2.markets.businessinsider.com/60031b0a660f6c001834996a?format=jpeg" />
<figcaption>Crews at Stennis Space Center lift the core stage of NASA's Space Launch System into place at test…

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