![An ATK technician installs one of more than 900 plies of insulation onto the inner diameter of an SLS booster segment case.](https://www.nasa.gov/wp-content/uploads/2023/03/174140-009_5.jpg)
School is in Session: Welcome to Boosters 101
An ATK technician installs one of more than 900 plies of insulation onto the inner diameter of an SLS booster segment case.
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https://www.nasa.gov/image-detail/school-session-welcome-boosters-101-2/
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