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The mobile launcher with NASA’s Space Launch System (SLS) rocket and Orion spacecraft aboard is seen inside the Vehicle Assembly Building during the opening of the doors to High Bay 3 before rolling out to Launch Complex 39B for the first time, Thursday, March 17, 2022, at NASA’s Kennedy Space Center in Florida. Ahead of NASA’s Artemis I flight test, the fully stacked and integrated SLS rocket and Orion spacecraft will undergo a wet dress rehearsal at Launch Complex 39B to verify systems and practice countdown procedures for the first launch.