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SLS requires Advanced Boosters by flight nine due to lack of Shuttle heritage components - NASASpaceFlight.com
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Amazon.com: Estes Boosted Bertha Flying Model Rocket Kit| Multi-Stage Booster Rocket | Advanced Level Build | Soarsup to 1000' : Arts, Crafts & Sewing
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SLS requires Advanced Boosters by flight nine due to lack of Shuttle heritage components - NASASpaceFlight.com
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