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The agency will roll the combined Space Launch System (SLS) rocket and Orion spacecraft out of the Vehicle Assembly Building (VAB) to Launch Pad 39B at NASA’s Kennedy Space Center in Florida for testing no earlier than March 2022. While the teams are not working any major issues, NASA has added additional time to complete closeout activities inside the VAB prior to rolling the rocket out for the first time. Engineers are conducting final integrated tests of Orion and SLS along with the ground equipment, prior to rolling the rocket and spacecraft to the launch pad for a final test, known as the wet dress rehearsal. This final test will run the rocket and launch team through operations to load propellant into the fuel tanks and conduct a full launch countdown. Following a successful rehearsal, NASA will roll the stack back into the VAB for final checks and set a target date for launch.
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