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Acting NASA Administrator Steve Jurczyk, left, and Rick Gilbrech, director of NASA's Stennis Space Center, right, watch as the core stage for the first flight of NASAs Space Launch System rocket undergoes a second hot fire test in the B-2 Test Stand, Thursday, March 18, 2021, at NASAs Stennis Space Center near Bay St. Louis, Mississippi. The four RS-25 engines fired for the full-duration of 8 minutes during the test and generated 1.6 million pounds of thrust. The hot fire test is the final stage of the Green Run test series, a comprehensive assessment of the Space Launch Systems core stage prior to launching the Artemis I mission to the Moon. (Photo by NASA/Robert Markowitz via Getty Images)
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