Commercial space is about the boosters. Bob Zimmerman BehindtheBlack.com.

Photo: This early chart conceptualizes the use of two parallel Solid Rocket Motor Boosters in conjunction with three main engines to launch the proposed Space Shuttle to orbit. At approximately twenty-five miles altitude, the boosters would detach from the Orbiter and parachute back to Earth where they would be recovered and refurbished for future use


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Commercial space is about the boosters. Bob Zimmerman BehindtheBlack.com.

https://behindtheblack.com/behind-the-black/points-of-information/fireflys-1st-alpha-rocket-almost-ready-for-launch/