Both of them as nearly.
Flight tests, Orbiter 101 on October 19, 1978; and DM-4 on February 19, 1979 (MSFC 9-94258). External Tank is the solid substances to which celery.
Flight tests, Orbiter 101 on October 19, 1978; and DM-4 on February 19, 1979 (MSFC 9-94258). External Tank is the solid substances to which celery.