I'd like to expand on this and clarify for anyone reading this that it's not just using the same type of engines as the shuttle. They are literally the same re

I'd like to expand on this and clarify for anyone reading this that it's not just using the same type of engines as the shuttle. They are literally the same reusable RS-25 engines taken off the shuttles over a decade ago and used for one final expendable launch. Likewise the SRB segments are reused from shuttle launches, but reconfigured and expended for one more launch on SLS. The $32 Billion spent so far on SLS have been to rearrange pieces from the shuttle parts bin. There are further contracts to make new RS-25 engines and SRBs optimized for expendability once they run out of old shuttle equipment.