https://www.nasa.gov/image-article/preliminary-design-review-sls-core-stage/
Manager Tony Lavoie addresses a board made up of engineers and scientists at the Preliminary Design Review for the Core Stage on Dec. 20.
preliminary design reviewsls core stagenasa
https://www.sciencetimes.com/articles/30933/20210429/nasa-sls-core-stage-faces-challenging-schedule-as-it-arrives-at-kennedy-space-center.htm
The barge Pegasus arrived at KSC on April 27 with the core stage of the SLS on board. Will NASA launch this rocket this year?
sls core stagenasafaceschallengingschedule